Windows psql.exe password from pgpass.conf

Postgres 8.1 on a windows machine.

I followed instructions and went to APPDIR to setup the file
pgpass.conf:
*   *   myuser   mypass

I also tried: *   *   databasename    myuser   mypass

I also tried: *:*:myuser:mypass

When i start psql -U myuser, it always requests that I type the
password. What could be wrong? I've found very little information
regarding the pgpass.conf file...

thank you