Same problem - received the AOR on April 21 and still can't link.
I start to suspect that the name of the city is spelled differently on IMM and on GCKey.
On the form ADDITIONAL FAMILY INFORMATION there is a line:
"I certify that I do not have a spouse or a common-law partner, ex-spouse, or former common-law partner."
Well, if my marriage was annulled, then do I have an ex-spouse or not?