python and multithreading problem

[whatazor]

Hi all,
I made an application that use multithreading (indifferently importing
thread or  threading module) , but when I call some wrapped modules
(with swig) from my application they run like there is only a single
thread (and my application gui ,made with wxPython, freezes). If I use
other modules not wrapped, but created for test that multithread
works, and gui is not freezing are ok.
Modules that wrap DLL are not my product but are created by another
developer with VS.NET, and the only thing I can think is that they're
builded without multithreaded compiler option. Can it be another cause
for this behaviour, can this explanation be correct? maybe also swig
have a multithreading option.

thank you in advance
w