odbc otl lockup in rlogon

I am using he latest otl header (v  4.0.159) with the latest odbc library.  I have a heavily multi-threaded application using otl to do many simultaneous read/writes on my postgres database. 

Randomly, I will see the rlogon function lockup on the SQLSetEnvAttr function call. 

When I set Threading=3 or Threading=1, it locks up more often.
Also, I have compiled odbc and postgres for multi-threaded use.  I also call the otl_initialize(1), so that otl lets the driver know it is multithreaded.

My odbcinst.ini is setup as follows:
[PostgreSQL]
Description    = ODBC for PostgreSQL
Driver        = /usr/local/odbc/lib/libodbcpsql.so.2
Setup        = /usr/local/odbc/lib/libodbcpsqlS.so.2
FileUsage    = 1
CPTimeout    = 1000
CPReuse        = 20
Threading    = 2

[ODBC]
Trace        = no
TraceFile    =
ForceTrace    = No
Pooling        = Yes

Any ideas???