I had to to create a sym link from libpq.so to libpq.so.2.0 which in turn is sym linked to 2.1:
# ls -l /usr/lib/libpq.so*
lrwxrwxrwx 1 root root 12 Aug 30 03:37 /usr/lib/libpq.so -> libpq.so.2.0
lrwxrwxrwx 1 root root 12 Jul 20 03:52 usr/lib/libpq.so.2 -> libpq.so.2.1
lrwxrwxrwx 1 root root 21 Aug 30 03:47 usr/lib/libpq.so.2.0 -> /usr/lib/libpq.so.2.1
-rw-r--r-- 1 root root 66296 Jun 16 03:26 usr/lib/libpq.so.2.1
