Problem

Sir,
I dont know whether this is a right place to ask this question,but I
hope you guys will still help me out.
I'm in a serious problem,we are using Postgres having 2-3
databases,today when i started the server I couldnot find a single
database,also it is not allowing me to create a new one.Its showing the
following error
# createdb test;
psql: FATAL 1:  Database "template1" does not exist in the system
catalog.
createdb: database creation failed

What could be the reason ?
Please help me out.
Thanx in Advance.

Ram