wirless timing out

Wireless connection times out after so many minutes of inactivity on computer, I cannot find setting to prevent this. I want continuous wireless connection without having to work five minutes at waking up the wireless connection and getting another ip address assigned. None of my other computers are timing out.
I don't know if this is a vista or hp computyer problem?
What settings can I check?

Device Manager --> Network Adapters --> right click {your wireless card} --> Properties --> Power Management --> uncheck Allow the computer to turn off this device to save power.

Thanks, I alreadry tried that it did not work. I did contact Hp online assistance and they had me go to Start, run and then type in some config strings, I can not remember exactly but something like configreset/resetip, It seems to work I just got on this morning and it was ready to go, still connected.