Pgadmin Does CREATE DATABASE but psql does not

Hi to All,

Could Someone resolve this problem?

If a Database "MYDB" is created with Pgadmin there is no problem.

But if it is invoked psql as superuser (postgres) no command is executed. Neiher the other command as "initdb"

Instead if, in psql is typed the command "\l", all DB are seen.

I tried with psql installed in my laptop, in the linux server; with psql of Postgres 8.4.1; 9.0; 9.2, but it was obtained the same effect.

It may be a banal quaestion for You.

Tanks in advance.
Gianni Pinna