I have problem with the GDB debbuger and I can't figure out how to solve it: The GDB does not stop at breakpoint or anywhere after I start the session.

In the raw debugger log, its says this when setting a breakpoint:
> break "Z:\<long path to source>\<sourcefile.cpp>:61"
No source file named Z.
Breakpoint 11 ("Z:\<long path to source>\<sourcefile.cpp>:61") pending.
>>>>>>cb_gdb:
"path name is too long, project file has courupted or something", answer is no. I created fresh project, added sources to it and compiled, but still the debugger refuses to work. I moved the project directly at Z:\ to shorten paths but this didin't help. My last guess was that my C::B settings have been courupted. But no, I tested with other user and the problem presist.
And now the weird part: The debugger works fine with any other project. :?
PS: Have I realy programmed something so cryptic, that even GDB goes crazy about it?