Hope you guys can help me with this one

Mar 18 10:35:11 d54C18B21 /System/Library/CoreServices/backupd[237]: Backup failed with error: 18
Mar 18 10:41:56 d54C18B21 /System/Library/CoreServices/backupd[305]: Backup requested due to disk attach
Mar 18 10:41:56 d54C18B21 /System/Library/CoreServices/backupd[305]: Starting standard backup
Mar 18 10:41:56 d54C18B21 /System/Library/CoreServices/backupd[305]: Error: Volume at path /Volumes/TM does not appear to be the correct backup volume for this computer.
Mar 18 10:41:56 d54C18B21 /System/Library/CoreServices/backupd[305]: Backup failed with error: 18
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I've tried erasing, renaming, fixing permissions, deleting com.apple.timemachine.plist, reselecting disk. It has been a few weeks since I did my last update but nothing major changed in my OS so I'm stunned.

Thx for the help in advance

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 Snow Leopard 10.6.7  Gigabyte GA-P35-DS3P  Intel Q6600 @ 3Ghz  Corsair CM2X2048-6400DHX  Gigabyte HD5770 Silent Cell  Samsung SyncMaster 2494SW  ALC889a  Creative T5400 5.1  Maxtor 380215AS  Pioneer DVR-215D  Presonus Inspire 1394  KRK Rokit 5  Wacom Bamboo One 
 SL USB Guide => http://www.infinitemac.com/f57/guide...k-drive-t3705/ 