ddd doesn't recognize libc !?

Hi,
I encounter some problems since few days with ddd 3.3.2-2.
everything worked at the beginning except that I had to run ddd as root to
prevent the message about libc (I'll talk about it later).
My problems began later with the impossibility to debug on a remote target.
No answer to the command 'target qnx ip_adr:port' from the target despite pdebug
is launched correctly.

Now, everytime I want to debug a program, I get the following message:
libc.so.2: not in executable format: file format not recognized.

As I said, I could prevent this message by running ddd as root. but now, that
doesn't help me anymore!

If I use gdb only, there is no problem.

Any idea?
thanks,
Alain.