Problem with wireless connection

I have an intel 3945 wireless card on my xps1530...

I also have a NETGEAR wireless router at home and a broadband connection to it.

Although i can connect to the internet thru my laptop wirelessly, the problem is...

every time i resume my laptop from sleep mode, the connection to the net doesnt get re-established.

I have tried switchin the wifi button on/off, also tried refreshing connections, using windows diagnostics etc.

no luck!

Eventually, i have to either restart my laptop or re-plug the router.. only then is the connection re-established.

Its becoming increasingly annoying to switch my router off/on evertime i put my laptop on sleep.

Please help.

Thanks.