GDB on AIX 4.3.3 cores dump

[Alex]

Hi,

I am trying to use gdb to debug C++ application built using xlC_r
compiler of VisualAge 5.0.
We are running AIX 4.3.3 on RS6000 box.
I have built latest gdb 5.1 and it cores dump as soon as I try to load
my application .
I also tried the gdb which comes with IBM linux toolbox, with the same
result.
Interestingly enough, gdb is able to debug itself.
What can be wrong?

Thanks
Alex