unable to authenticate to YouTube

Hey,

First of al i have to pardon my english.

I don't know what i'm doing wrong. I have followed the steps in the install.txt, i have searched google for solutions but no luck in that.

I have created an youtube account and got a developer key but still i get the error.

If someone knows the solution please let me know.

Its a school task and it's due on monday.

Thx