[boost] [1.3.9][hpux]:pthread_create syambol does not exist in boost.1.3.9 library

Hi I built both boost.1.3.2 and boost 1.3.9 in the hpux 11.23 system. I can see the pthread_create symbol in boost 1.3.2 library but not in boost1.3.9 thread library. Due to this issue, my application crashing hpux 11.11 with boost 1.3.9 system and showing message "pthead_create symbol not found" in the boost thread library but working fine with 1.3.2. Please let me know the solution. Regards Gopal