Vault Not Ejecting All Tapes

Hi friends,

Need some help on figuring this one out:

System:

Master: SLES 10.3 x64 NetBackup v7.5.0.6

Media: 2 SLES 10.3 x64 NetBackup v7.5.0.6 and 1 Win2k8 NetBackup v7.5.0.6

Robot: Quantum Scalar i6000 wirh LTO4/LTO5 drives

I use two different types of tapes on my environment for backups (LTO4 and LTO5), backups run fine with no issues, however, at vaulting time, only LTO5 tapes will eject, no LTO4s are ejecting at all. The LTO4s are part of the same pool, and I have that pool to be ejected in the profile, but only ejects LTO5s.

Any suggestions?

Thanks