|Have you been through this lot?:|
Also, if you haven't already done so, update your adapter drivers. I'm not necessarilly suggesting they are out of date but sometimes if there is a software glitch updating can fix it.
Did this just recently start happening?
Might be an idea to briefly list what you've tried to save us going over all the old ground again.
Always pop back and let us know the outcome - thanks
message edited by Derek