Postgres : error while running initdb

Dear Sir,

initdb: The directory /usr/local/pgsql/data exists but is not empty.

If you want to create a new database system, either remove or empty the 
directory /usr/local/pgsql/data or run initdb with an argument other than 
/usr/local/pgsql/data.


This is the response that I see when I typed in initdb -D 
/usr/local/pgsql/data to initialize the database.  I can?t figure out what 
is wrong?

Can u please help me....

thanks in advance

regards,
Savita Banginwar
Sutra systems