Cannot import jobs after first importing

Hi,

We transfer jobs via atl file to qas DS, but now we cannot import second, fird... jobs into QAS repository via atl file.

First jobs imported fine, but second and another jobs cannot import, Data Service Designer is freezes, desission is one - reboot DS server.

After reboot, firtst (may be new) job imported fine, but others doesn't imports. I can't understand why.

Data Services 4.0, sp3 (Win)