Apple ID and Password
Hi
Every time I try to download anything I get so far and then it asks me to enter my Apple ID and password. I enter the correct details (the ones I've used to log onto this site) and I have already tried changing my password and recieved email confirmation of this and yet it does not recognise me or let me log in so I can't do anything. I am new to Apple macs but getting very frustrated with this. Help!
Thanks
MacBook Pro, iOS 7, MAC OS X Lion