Problem in acquire IP address

I have a LAN card inserted into a my PC . I connected that PC to a Surecom ep4904sx router. I set the settings to obtain IP address automatically. The problem is that it does not acquire any IP address. when i start my pc it display message "acquiring IP address" for long time. I tried to connect my laptop with that router and it obtained an IP address in just about a few seconds.

Go into the router and make sure the DHCP connection settings are correct on it so that it will assign the computers an IP. Also right click on My Computer, go down to Services and Applications, Services, and make sure that your DHCP service on the computer is running.

Check to see if it's trying to connect through a proxy, is so uncheck it. Since these connect through a router, pull the DNS and gateway info from your working pc, and do a manual setup. If you running firewalls, disable and see if that helps. I had an update on my firewall kill all of my connections and had to uninstall and reinstall.

Tried to put an IP address manually and see it's working or not.

I put an IP address manually and it worked just fine. but only problem is when I obtain IP address automatically.