Appworld login problem

Hie everyone and happy holidays. I'm having issues with logging into appworld (prob being daft, but here we go). I owned a BB bold that I gave to my little brother after the contract finished (he is in South Africa). Had appworld on that phone. Now I've upgraded to a new phone and I have appworld on there as well. Now the issue is, I'm trying to download a paid app and my bro's email ID is coming up. His details are needed to log in. Ive tried to log in with my old details I used on the old phone and it won't let me. I've deleted and re-installed appworld, in hopes it would allow me to create a new account, to no avail. I dont want to use bro'd details as I will be buying apps. It sounds like appworld is still liked to both phones as I was owner (i think) and I need to change that. Please help!