createlang

Hello
Im trying to load plpgsql into my test db... Im wondering if theres a
way to check if its loaded... I do:
test-# createlang plpgsql test
test-#
When i try load an example function:
test-# \i test.sql
Im getting:
psql:test.sql:5: ERROR:  language "plpgsql" does not exist
HINT:  You need to use "createlang" to load the language into the
database.
Anyone any hints for me?
Thanks
Eoghan