W7 Loses Mounted Drive at Reboot

I just switched one box from Vista to W7.
I mount a network drive, I use it, I reboot, the mount is gone..... WHY?
I have been using this drive for many months on Vista, NO problem.

ps: I set the mount in Windows 7 the same as I did in Vista, including checking the RECONNECT AT LOGON box.

this is how it should be..