I'm trying to download apps from blackberry app world or even complete the update for it but it keeps asking me to enter my blackberry email address and password and everytime that I do it tells me it's incorrect which I know it's not. It didn't used to do this so I don't know why it's doing it now. I tried pulling the battery and that didn't help. Has anyone else had this problem? I've a curve 8530 and I've had nothing but problems with it since about a month after I got it which was back in Sept.
You have to set up an separate BlacBerry App World account. You can use your same email & password as your BB account, but it sounds like you haven't done the initial setup yet. Click on 'create account' and you should be good to go after that.