Help postgres

Hello I have a problem in SuSE 8.2, treatment of using pgsql (it programs graph to be connected to the postgres) but it presents me the following error: "Error connecting to the server: could not connect to server; refused connection. Is the server runnig on host 127.0.0.1 and accepting TCP/IP connections on port 5432? " The connection is refused because the port is not enabled 5432. The service postgres this activated. Thanx for the suggestion!