PGaccess Cannot connect to DB

I think it's common problem but I didn't found answer in any
domcumentation included with pgaccess.

I've got postmaster running and I've got no problem to
connect and manipulate data with psql, but when I try to connect
with pgaccess I got message, that connection to database xx on localhost
faild, authentication of unknown type faild with unknown message 65xxx. I
forgot my note with exact message, but I hope its enough. It happens with
pgacces included with Debian 2.1 Linux and with latest version of
PostgreSQL. I downloaded latest version of pgaccess but its the same.
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