Q: iTunes vs. iTunes Connect

I installed iTunes Connect on my iPhone 5. It asks me for my Apple password (ID is already there). I enter it & get the message that it is incorrect. I've always used this password. It gives me the option to change passwords, so I do. I still get the message "Your Apple ID isn't enabled for iTunes Connect (2002)  I didn't see an option to sign up for iTunes Connect when I downloaded the app.  I am so sick of going around in a loop. I just want to be able to add a song from iTunes as my phone ringer.  What am I doing wrong??