error with parent in pom

hello,

i'v error with a parent pom

my structure is :

Project:
   |---core
        |--- src
        |--- bin
        |--- .pom
   |---dao
        |--- src
        |--- bin
        |--- .pom
   |---parent
        |--- src
        |--- bin
        |--- .pom
   |---...

my core call the project parent and his pom

and it doesn't work


[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

GroupId:   com.test.blart
ArtifactId: blart-parent
Version: 0.0.1-SNAPSHOT

Reason: Unable to download the artifact from any repository

    com.test.blart:blart-parent:pom:0.0.1-SNAPSHOT

from the specified remote repositories:
  central (http://repo1.maven.org/maven2)



[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.reactor.MavenExecutionException: Cannot find parent:   com.test.blart:blart-parent for project:   com.test.blart:blart-core:jar:${blart-version} for project   com.test.blart:blart-core:jar:${blart-version
}
        at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:378)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:292)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:301)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.project.ProjectBuildingException: Cannot find parent
:   com.test.blart:blart-parent for project: c  com.test.blart:blart-co
re:jar:${blart-version} for project   com.test.blart:blart-core:jar:${blart-version}
        at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(D
efaultMavenProjectBuilder.java:1369)
        at org.apache.maven.project.DefaultMavenProjectBuilder.buildInternal(Def
aultMavenProjectBuilder.java:820)
        at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFi
leInternal(DefaultMavenProjectBuilder.java:505)
        at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMave
nProjectBuilder.java:197)
        at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:583)
        at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:461)
        at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:365)
        ... 11 more
Caused by: org.apache.maven.project.ProjectBuildingException: POM '  com.test.blart:blart-parent' not found in repository: Unable to download the artifact
from any repository

   com.test.blart:blart-parent:pom:0.0.1-SNAPSHOT

from the specified remote repositories:
  central (http://repo1.maven.org/maven2)

 for project   com.test.blart:blart-parent
        at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepo
sitory(DefaultMavenProjectBuilder.java:602)
        at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(D
efaultMavenProjectBuilder.java:1365)
        ... 17 more
Caused by: org.apache.maven.artifact.resolver.ArtifactNotFoundException: Unable
to download the artifact from any repository

  com.test.blart:blart-parent:pom:0.0.1-SNAPSHOT

from the specified remote repositories:
  central (http://repo1.maven.org/maven2)


        at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(De
faultArtifactResolver.java:212)
        at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(De
faultArtifactResolver.java:74)
        at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepo
sitory(DefaultMavenProjectBuilder.java:555)
        ... 18 more
Caused by: org.apache.maven.wagon.ResourceDoesNotExistException: Unable to downl
oad the artifact from any repository
        at org.apache.maven.artifact.manager.DefaultWagonManager.getArtifact(Def
aultWagonManager.java:332)
        at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(De
faultArtifactResolver.java:200)
        ... 20 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Wed Jun 24 14:46:49 CEST 2009
[INFO] Final Memory: 1M/2M
[INFO] ------------------------------------------------------------------------

How i could defined my parent pom for sonar ?

thanks

FB