pthread_create() fails SysV in myDaemon on boot

[Michael D. Berger]

In F15_64, on starting SysV myDaemon in level 3, with S99myDaemon

rtn = pthread_create() fails with:
   rtn=1=Operation not permitted

man pthread_create says this means:
   No permission to set the scheduling policy
   and parameters specified in attr.

This happens for:
   policy = SCHED_FIFO
   policy = SCHED_RR

This code works if, after boot, I start it with:
   /etc/init.d/myDaemon start

and starts on boot in my old CentOS 5 box.

Thanks for your suggestions.
Mike.