My application hangs on call to ldap_result when connection to DS is in SSL mode

Hi,
        I have a server which communicates with DS using the LDAP C SDK API. 
I am currently running my server on RHEL 5 (NPTL Thread), on a call to 
ldap_result() the thread hangs and following are the stack trace

#0  0x00b41402 in __kernel_vsyscall ()
#1  0x00a86a1e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2  0x00a82870 in _L_mutex_lock_85 () from /lib/libpthread.so.0
#3  0x00a823bd in pthread_mutex_lock () from /lib/libpthread.so.0
#4  0x005fbfab in ldap_result () from ../../../lib/libldap_wrapper.so

This happens only when the connection between the server and the DS is in 
SSL mode, it works fine when the connection is in opne mode.
The C- SDK was compiled on RHEL-3 with gcc 3.3.2.

Thanks in advance.

Regards,
Richa Pandey