postausgang funzt nicht

Hallo
Ich habe mir gerade Pegasus Mail auf mein Rechner gespielt soweit allles prima aber ich kann Nachrichten verschicken aber keine Empfangen ich bekomme immer folgende Fehlermeldung:

The POP3 server you have specified in your Network Configuration settings has returned an error code indicating that the password you have supplied for your account is incorrect. On some systems, this error may actually also mean that you have given an invalid user name, since revealing that a username is valid can be seen as a potential security breach. Please correct the password or username in your Network Configuration screen and try again. Note that although they may be legal, passwords which contain spaces may cause problems. If your password on the POP3 host contains spaces, you should consider choosing another password. This error message may occasionally be caused by the loss of your network connection if you are accessing your mailbox via SLIP or PPP.

Was mache ich falsch ?
versenden geht übrigens ganz klasse!