Problems connecting Dell Inspiron 1545 (Windows Vista Home) to Virgin Broadband

Hi there, 

Every time I try to wirelessly connect my Dell Inspiron 1545 to our Virgin Broadband (not Virgin Media as no cable in the road, if that makes a difference), I have to switch the router off then on, whilst my laptop is still on. This is necessary every time my laptop has been off, crashes or is restarted.

I have tried various things seen on other boards, but none has worked. It seems to be only with Virgin Broadband that I have this problem. It has worked fine with TalkTalk, Sky, BT, etc.

Any ideas greatly appreciated.

Thanks in advance.