Help with some basic IM/Mail stuff....

I just got my phone today and am trying to set some stuff up but for some reason it's not working. I've already installed Snaptu and like 11 games with no problem using TK...this is the only thing giving me problems.

I have Yahoo! IM set up just fine, and when I go to set up my AIM it says "Check your screen name and password" after I have entered it time and time again correctly, case sensitive....

Getting into Email from the messages folder: I try and use my Yahoo! Mail to be able to receive my email to my phone and it says "Failed to validate login credentials. Account not created." Once again, clicking on the "create account" option and selecting Yahoo, putting in my user name and correct password, I still receive this message....

Any ideas on what I may be doing wrong?

Thanks ahead of time....

CAIN