DPM 2007 and MSL2024 LTO-4

[Ikariux]

Hello

I have connected MSL2024 tape library (SCSI) to Windows 2003 x64 server that is running DPM 2007. Tape library is loaded with 24 tapes. DPM detects tape library (please see screenshot) but i cannot see any free tapes in it. Numerous times i press inventory (fast and detailed afterwards), inventory finishes with success state in few seconds and no tapes are listed. In MSL2024 web management i can see that status is OK, all tapes are in place and ready.
Maybe there are some specific drivers i should use for tape library?
Please help me, already wasted all week with no success...

Thank you for help in advance

Aidas