pgdump

Hi

I have a pgdump.sql file and i want to restore it.The postgreSQL database server is running and i issue the command psql -U postgres pgdump.sql in the command prompt.

i get the following error.
C:\Program Files\PostgreSQL\8.2\bin>psql -U postgres pgdump.sql
psql: could not connect to server: Invalid argument (0x00002726/10022)
        Is the server running on host "???" and accepting
        TCP/IP connections on port 5432?

Thanks

Anuradha