Network drive crashes in TC but in Explorer no problems.

[yersinia]

Hi I have installed TC 6.50. Now I run 2 machines on a network with Windows XP Sp2.
I can access one network drive E: on the other machine but when I try to access the other drive D: TC freezes and I have to abort it in the task manager to get out.
In windows explorer I can acces both network drives without problems.
Any suggestions what might be wrong?
Thank you very much!