Apache james in lnux

Hii
Im new to apache james, when im installing james on ubuntu im getting this error..please help me out...



ERROR   2009-08-31 16:54:35.606 [Phoenix.] (): Component named "pop3server" failed to pass through the Starting stage. (Reason: java.net.BindException: Permission denied).
ERROR   2009-08-31 16:54:35.606 [Phoenix.] (): There was an error running phase "startup" for Block named "pop3server". (Reason: Component named "pop3server" failed to pass through the Starting stage. (Reason: java.net.BindException: Permission denied).).
org.apache.avalon.phoenix.containerkit.lifecycle.LifecycleException: Component named "pop3server" failed to pass through the Starting stage. (Reason: java.net.BindException: Permission denied).
        at org.apache.avalon.phoenix.containerkit.lifecycle.LifecycleHelper.fail(LifecycleHelper.java:354)
        at org.apache.avalon.phoenix.containerkit.lifecycle.LifecycleHelper.startup(LifecycleHelper.java:226)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.startup(DefaultApplication.java:530)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.doRunPhase(DefaultApplication.java:478)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.runPhase(DefaultApplication.java:409)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.start(DefaultApplication.java:180)
        at org.apache.avalon.framework.container.ContainerUtil.start(ContainerUtil.java:260)
rethrown from
java.net.BindException: Permission denied
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
        at java.net.ServerSocket.bind(ServerSocket.java:319)
        at java.net.ServerSocket.<init>(ServerSocket.java:185)
        at org.apache.avalon.cornerstone.blocks.sockets.DefaultServerSocketFactory.createServerSocket(DefaultServerSocketFactory.java:74)
        at org.apache.james.core.AbstractJamesService.initialize(AbstractJamesService.java:337)
        at org.apache.james.pop3server.POP3Server.initialize(POP3Server.java:116)
INFO    2009-08-31 16:54:35.610 [Phoenix.] (): exception while starting:Component named "pop3server" failed to pass through the Starting stage. (Reason: java.net.BindException: Permission denied).

WARN    2009-08-31 16:54:35.613 [Phoenix.] (): Failed to start application james.
org.apache.avalon.framework.CascadingException: Failed to start application james.
        at org.apache.avalon.phoenix.components.kernel.DefaultKernel.startup(DefaultKernel.java:313)
        at org.apache.avalon.phoenix.components.kernel.DefaultKernel.addApplication(DefaultKernel.java:376)
        at org.apache.avalon.phoenix.components.deployer.DefaultDeployer.deploy(DefaultDeployer.java:357)
        at org.apache.avalon.phoenix.components.embeddor.DefaultEmbeddor.deployFile(DefaultEmbeddor.java:542)
        at org.apache.avalon.phoenix.components.embeddor.DefaultEmbeddor.deployFile(DefaultEmbeddor.java:535)
        at org.apache.avalon.phoenix.components.embeddor.DefaultEmbeddor.deployFiles(DefaultEmbeddor.java:520)
        at org.apache.avalon.phoenix.components.embeddor.DefaultEmbeddor.deployDefaultApplications(DefaultEmbeddor.java:509)
rethrown from
org.apache.avalon.phoenix.interfaces.ApplicationException: Component named "pop3server" failed to pass through the Starting stage. (Reason: java.net.BindException: Permission denied).
        at org.apache.avalon.phoenix.components.application.DefaultApplication.start(DefaultApplication.java:186)
        at org.apache.avalon.framework.container.ContainerUtil.start(ContainerUtil.java:260)
        at org.apache.avalon.phoenix.components.kernel.DefaultKernel.startup(DefaultKernel.java:295)
        at org.apache.avalon.phoenix.components.kernel.DefaultKernel.addApplication(DefaultKernel.java:376)
        at org.apache.avalon.phoenix.components.deployer.DefaultDeployer.deploy(DefaultDeployer.java:357)
        at org.apache.avalon.phoenix.components.embeddor.DefaultEmbeddor.deployFile(DefaultEmbeddor.java:542)
        at org.apache.avalon.phoenix.components.embeddor.DefaultEmbeddor.deployFile(DefaultEmbeddor.java:535)
rethrown from
org.apache.avalon.phoenix.containerkit.lifecycle.LifecycleException: Component named "pop3server" failed to pass through the Starting stage. (Reason: java.net.BindException: Permission denied).
        at org.apache.avalon.phoenix.containerkit.lifecycle.LifecycleHelper.fail(LifecycleHelper.java:354)
        at org.apache.avalon.phoenix.containerkit.lifecycle.LifecycleHelper.startup(LifecycleHelper.java:226)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.startup(DefaultApplication.java:530)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.doRunPhase(DefaultApplication.java:478)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.runPhase(DefaultApplication.java:409)
        at org.apache.avalon.phoenix.components.application.DefaultApplication.start(DefaultApplication.java:180)
        at org.apache.avalon.framework.container.ContainerUtil.start(ContainerUtil.java:260)
rethrown from
java.net.BindException: Permission denied
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
        at java.net.ServerSocket.bind(ServerSocket.java:319)
        at java.net.ServerSocket.<init>(ServerSocket.java:185)
        at org.apache.avalon.cornerstone.blocks.sockets.DefaultServerSocketFactory.createServerSocket(DefaultServerSocketFactory.java:74)
        at org.apache.james.core.AbstractJamesService.initialize(AbstractJamesService.java:337)
        at org.apache.james.pop3server.POP3Server.initialize(POP3Server.java:116)
WARN    2009-08-31 16:54:35.633 [Phoenix.] (): Failed to stop application james as it is not initialized/started.