sitecom WL-523 default

Hi! im writting this, soz i have a problem with my password/username of my router. a year ago my brother configurated it for my PC, and it worked fine, until i formated my PC. i cant get internet from it, and when i try to access it, i cant remember the password or username :S. ive kept presses reset, then turned it (the router) on, waited, and ive pressed reset for about 20 seconds. i think this may have out everything in default. but can anyone tellme whats usually the default password/ username for this router? or does sitecom uses the same defaults for all routers? thanks.