multiple threads

hi guys has anybody ever noticed any difficulties of FR to launch multiple initial threads? (thread_pool: start_servers n) context: on a Fedora Core 3 system (linux 2.6.9) I configured n=5 but FR would not start but one instance. also in the "radiusd -X" there is no notice of thread-pool config being read. does anybody have any ideas on that issue? how do I debug it? ("ldd radiusd" shows libpthread correctly linked into the binary). ciao artur