I've found the problem and it was *tada* my nick on IRC. Since it had more than 9 characters it wouldn't work. Eggdrop only handles "internal" usernames at max 9 chars. If your nick is longer, hey tough luck, !req commands will not work!
I changed my nick to something with only 5 chars. Telneted to the bot and added the new nick as a user (.adduser [IRCnick]), set a password to the user (.newpass [IRCnick] [password]) and set the +o flag (.chattr [IRCnick] +o). Violá it works.
Thanks for all responses!
I'll be back