Not able to change eclipse debug settings

Hello eclipse users,

I have got a problem with changing the project specific debugger settings. For selecting the debugging user, these options are given:

- Login-User (default)

- Username

- User-independent

I want to debug as a different user, so I change to one of the last two options, press ok, nothing happens (not even an exception), but the debugger is not working. When I return, my settings are back to default. The corresponding system has SAP_BASIS 7.40 SP-Level 0007.

Somebody else experiencing that problem?

Greetings,

Andre