Trouble backing up to a NAS using TIH 2011

All:

I successfully used TIH 2010 to do full daily backups to a NAS drive (each day into a separate folder) for a 7 day historical backup scheme. This has worked well, fully automatically, for a couple of years.

I have now upgraded to TIH 2011 and I have yet to get it to create a backup on the NAS a single time (all manual attempts).

The NAS is a QNAP TS-119 with a single WD 2TB Caviar Black accessible from the desktop on a gigabit LAN. A share on the NAS is permanently available as S:.

When I start a backup in TIH 2011, it prompts for authentication settings. I have tried every possible set of credentials here, including an admin NAS user, and a admin Windows user. In every case, TIH reports the connection has failed.

Since have a permanent share (S: drive), why can't I convince TIH to just backup to S:, which I think the last version was doing, and not have it treat it as a UNC drive (I think I saw it convert my S: reference to a \\Saturn reference).

I have been incredibly pleased with the many Acronis products I have, but from the inability to get data on the NAS, to the progress bar issues (I'm seeing this also), to the incredibly long waits for it to attempt to authenticate, it seems TIH 2010 is a far more stable product.

I updated my 3 copies to 2011, but so far, I am unable to really use this product. I might have to return to 2010.

Does anyone has any similar trouble? Any known solutions? Am I missing something here?

Thanks.