Originally Posted by Tousmio
There's your problem
You need to first create a new account in the PBE your normal account doesn't stick to the pbe server
P.S you cant create an account right now
He's got the right of it. There's a separate registration for the PBE, meaning your account(s) won't work on the PBE without specifically registering for that. As it stands, Riot has closed any further PBE registrations until they've dealt with the issues of trolls in the community that either don't understand the concept of the beta, or are just looking for ways to flip the bird at Riot.