[RCU] fail login

hi all,

May be it won´t be the rigth place to post this but i am new to mail servers... I have installed a postfix + dovecot on a fedora machine ( it is a VMware Image, because i am afraid to do it in the production server before i knew what i am doing) i am able to send mails, and it seems dovecot is running properly... i am able to connect via telnet and i am logging with the username/ pasword of the accounts i have created. I thought they were imap user/ password aswell, but the roundcube interface doesn´t allow me to login. Anyone could point me what i am doing wrong? I know it a very basic question... Any help would be great!! Thanks

Pili

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