Network never works after hibernation

> I like to use sleep/hibernate because my classes are 15 minutes apart and
> don't want to bother with a complete shut down. However, when I "wake up" the
> computer from a sleep or hibernation session, the internet no longer works.
>
> I'm not a beginner-- it's not that the wireless signal disconnects, it's
> that all network functions stop working. I can't open up the windows network
> toolbar/control, I can't see what I'm connected to, I can't even use my
> proprietary thinkpad network access program. They all try to open but freeze
> halfway.
>
> This isn't just with wireless. When I hibernate at night connected to
> ethernet and turn it on next night, the computer refuses to automatically
> connect to anything (both the ethernet and wireless). The network controls
> freeze here too.
>
> This happens every time. I've tried disconnecting the networks and turning
> off the wireless radio before hibernate -- still freezes. The only way to
> reconnect after a hibernate is to shut down, but the shut down doesn't even
> work. I've left it on "please wait as your computer shuts down" for over 30
> minutes with no change. I have to disconnect the power.
>
> Anyone know what's going on? I'm running a Thinkpad T43 w/ intel pro 8220
> wireless card, all drivers updated. Thanks for your help