Thanks for your reply.
The driver is named correctly and the config.tcl points to nsposgres.so. I will try to reinstall the driver or AOLserver that doesn't work.
Are you sure this problem is not postgresql installation related?
I saw an error like you are reporting once a time in a postgresql list about installed postgresql from source and linkage from libecpg.so with ssl. Sorry I dont remember where...
If youre running postgresql from source try a solution to add LD_LIBRARY_PATH to your env (if you didn't done it yet) before loading nspostgresql. You can either use a shell script similar to this.