flash media server errors

We're running into problems using FMS. we need someone to troubleshoot fms. it is installed on centos. It works fine running 2 applications simultaneously but when a 3rd app is started (all video streaming). we get these errors: Failed to create thread (TCPollThread Ctor). Nov 26 22:59:37 host Adaptor[17579]: Failed to create thread (TCPollThread Ctor). Nov 26 22:59:37 host Connector[17579]: Failed to create thread (TCServerConnector::startConnector). Nov 26 22:59:37 host Service[17579]: Server aborted. Since FMS has been installed successfully and videos are streaming fine with the first 2 apps, this is probably a small project. PM any questions to clarify and we'll post additional info