To manage Threads in DLL's

Hello:
I'm unpacking a few DLL's which have Armadillo packer.
That dll's seem to have several threads each, that call one to another of them.

Once unpacking, application starts but suddenly close in about one minute, without advice.

I think the threads are responsible fo that.

¿Somebody has information about threads in dll's, that could help me?

Thanks

El Cid