Time Machine Error - backup too large
So I just picked it up from the repair facility and tried to backup and got this message:
"+This backup is too large for the backup volume. The backup requires 174.0 GB but only 106.3 GB are available.+
+To select a larger volume, or make the backup smaller by excluding files, open System Preferences and choose Time Machine.+"
My computer's hard drive is 200GB and my Time Machine is 500GB. Why doesn't it just do it's job and delete old backups to make space for the new backups? Does it no longer recognize that I have previously backed up my computer? I don't want to delete the sparsebundle and start all over.
Mark
2.2Ghz MacBook Pro, Mac OS X (10.5.8)