Time Machine works on Ethernet connection but not wireless

Hi,
This weekend I setup time machine to work with a NAS drive connected to my wireless router. If I connect my macbook to the router directly via an ethernet cable, and start a backup, it works fine. If I however try to start a backup when only on wireless it always fails. Here's what messages I'm getting:
Starting standard backup
Attempting to mount network destination using URL: afp://;AUTH=No%20User%20Authent@Backup%20to%20Iomega-0cd217.afpovertcp.tcp.local/backups
NetAuthConnectToServerSync failed with error: 64 for url: afp://;AUTH=No%20User%20Authent@Backup%20to%20Iomega-0cd217.afpovertcp.tcp.local/backups
Attempting to mount network destination using URL: afp://;AUTH=No%20User%[email protected]/backups
Mounted network destination using URL: afp://;AUTH=No%20User%[email protected]/backups
Warning: Destination /Volumes/backups does not support TM Lock Stealing
Warning: Destination /Volumes/backups does not support Server Reply Cache
QUICKCHECK ONLY; FILESYSTEM CLEAN
Disk image /Volumes/backups/Garys-MacBook-Pro_xxxxxxxxxxxx.sparsebundle mounted at: /Volumes/MAC Backups
Backing up to: /Volumes/MAC Backups/Backups.backupdb
Stopping backupd to allow ejection of backup destination disk!
Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/MAC Backups/Backups.backupdb/Gary's MacBook Pro/2011-01-15-042811
Error: (5) getxattr for key:com.apple.backupd.SnapshotContainer path:/Volumes/MAC Backups/Backups.backupdb/Gary's MacBook Pro/2011-01-15-042811
Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/MAC Backups/Backups.backupdb/Gary's MacBook Pro/2011-01-15-171318.inProgress
Error: (5) getxattr for key:com.apple.backupd.SnapshotContainer path:/Volumes/MAC Backups/Backups.backupdb/Gary’s MacBook Pro/2011-01-15-171318.inProgress
Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/MAC Backups/Backups.backupdb/Gary’s MacBook Pro/2011-01-15-042811
Error: (5) getxattr for key:com.apple.backupd.SnapshotContainer path:/Volumes/MAC Backups/Backups.backupdb/Gary’s MacBook Pro/2011-01-15-042811
Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/MAC Backups/Backups.backupdb/Gary’s MacBook Pro/2011-01-15-171318.inProgress
Error: (5) getxattr for key:com.apple.backupd.SnapshotContainer path:/Volumes/MAC Backups/Backups.backupdb/Gary’s MacBook Pro/2011-01-15-171318.inProgress
Backup canceled.
[SnapshotUtilities mountPointForVolumeRef] FSGetVolumeInfo returned: -35
Failed to eject volume (null) (FSVolumeRefNum: -179; status: -35; dissenting pid: -1)
[SnapshotUtilities mountPointForVolumeRef] FSGetVolumeInfo returned: -35
Failed to eject volume (null) (FSVolumeRefNum: -178; status: -35; dissenting pid: -1)
I've x'ed out the mac address from the sparsebundle name. Any help would be much appreciated as I can't understand why it's working when connected but not when on wireless.
Thanks!

GT777 wrote:
Hi,
Hi, and welcome to the forums.
This weekend I setup time machine to work with a NAS drive connected to my wireless router.
Time Machine doesn't work well, if at all, with many NASs. See the pink box in #2 of [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum).
There are several threads in the Snow Leopard > Time Machine forum with what appear to be similar problems with Iomega NASs.
If I connect my macbook to the router directly via an ethernet cable, and start a backup, it works fine. If I however try to start a backup when only on wireless it always fails.
An indication of a bad wireless connection or interference, but could also be the setup of the NAS or compatibility with the way the router works in wireless mode.
Mounted network destination using URL: afp://;AUTH=No%20User%[email protected]/backups
After an initial failure, it did connect.
Warning: Destination /Volumes/backups does not support TM Lock Stealing
Warning: Destination /Volumes/backups does not support Server Reply Cache
You've posted in the Leopard forum, and didn't specify what version of OSX you're on. But those messages usually indicate that your NAS is not fully compatible with the Time Machine requirements on Snow Leopard.
Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/MAC Backups/Backups.backupdb/Gary's MacBook Pro/2011-01-15-042811
Those are errors reading from the backups; specifically, getting extended attributes from the backups on your NAS (a "snapshot" is Time Machine's name for a backup folder).
First, contact the maker of the NAS for updated software/firmware compatible with Snow Leopard.
That might fix the problem. If not, all we can tell you is, it may be some problem with the setup of the NAS, and/or compatibility with the wireless function of your router. See the maker's instructions/Help/support.

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