Question on Ethernet Mac10/100 Mbps

Hi all,

I have tested on simulation that i am able to send the data through Txethmac as the nibbles is coming out from it. The only problem is that when it comes to real test, i am unable to capture the packets from computer. Does anyone face this problem? I am currently testing it on Spartan3E board using SMSC LAN83C185 for the PHY chips.