No symbol table found

[Pakeer]

Hello,
   I have downloaded a source file (about 100 c++ files) from openh323.org
, along with the make file. I also have compiled the source code with -g
option and the executable is simph323. when i was trying to use gdb and
trying to put the breakpoint the following error happens:

gdb simph323
b main.cxx:109

the error is:

No symbol table found. use file command.

 can somebody help me in solving this problem.

Regards,
pakeer.