time machine looking backup disk
I upgraded my macpro to OSX Lion a few weeks ago. Since that change, my time machine stopped working. I am able to assign a hard drive as the time machine back up drive (I formated it using Mac OS extended). the drive shows up on my desktop with the time machine logo. when I try to make TM run a backup, I keep getting a message "looking for backup disk." The drive I am using is an internal eSATA drive.
Any help would be appreciated.
Mac Pro, Mac OS X (10.7.1)