Xcode5 - Can not add my Apple ID

Question

I had downloaded new Xcode5 from AppStore, and found Accounts menu in Preferences. (short cut : Command + Comma(,) )

I have 3 Apple IDs assolciated with an Apple Developer Program. It was successful to add 2 of them, but I can't add the last one. Whenever I try, I get below error message:

Could not parse server's response as a plist

I have no idea why I can't sign in with the specific Apple ID, the last one.

Any help would be appreciated! Thank you in advance for your assistance!

Answer 1

Finally, it was solved.

Now, it works well after removing letter ampersand(&) from last name of the account on iOS Dev website.

If you have same problem as mine, you can simply go to the dev center website and change your profile.