Problem Installing my 11R Expansion

[Metamurphic]

Hi! I've read a lot of posts and done many searches but i couldn't find if someone has had this problem.

I enter the Serial Number and System Id supplied to me from my purchase of the 11R expansion and the mesage i recieve is as follows:

"SystemId Entered does not match the SystemId on record for this Serial"

I've entered many times correctly, double checked and still get the same message. I use the exact Serial Number and System Id provided to me by Avid after my purchase.

The numbers are same in the confirmation email i recieved as well as the 'your products' section of my avid account.

Has anyone experianced this and how would it be resolved?