Can posix thread weaks another posix thread in RTEMS?

[Matteo]

Hi 
I create in the posix_init two different threads and the threads wait on their 
condition variable, sun after the posix_init weak up the two threads with two 
different signal to the two condition variable, and all ok, without problem.

After I try to wait one thread on a condition variable timed wait and the other 
one thread on a normal condition variable, the thread on a condition variable 
timed weaks up after a few second and try to do the signal to weak up the other 
pthread.... and everything crash!
Why one thread can't weak the other pthread?
Some one has some idea?
Thanks in advance

Matteo