Problem with libpq.so.5 in pgadmin3-1.10.2

Hello,

I installed pgadmin3-1.10.2 and I got an error that might strange...

bash-3.1# /usr/local/pgadmin3/bin/pgadmin3
/usr/local/pgadmin3/bin/pgadmin3: error while loading shared libraries:
libpq.so.5: cannot open shared object file: No such file or directory

I have the libpq.so.5 in /usr/lib and /usr/local/lib.

I installed the wxWidgets 2.8.10, libxslt-1.1.24, libxml2-2.7.4-1 and
postgresql-libs-8.4.2-6.

I'm on Slackware 13 - 64 bit.

Thanks