Buddy,I was playing GTA IV with Xlive and an offline GFWL profile all these days and even my copy of GTA 4 (which uses GFWL like AC) is not activated online/linked to my account.Even mailed R* yesterday in the same format (see below) as I used for AC today,though still waiting for R*'s reply.But with AC,they should help you instantly if your mail is in the correct format.Wait,let me post the points to include in your reply.
''If your question is about a lost activation code, we require certain pieces of information. Please reply and provide the following:
1. Photo/scan of the receipt for the game
2. Photo of the physical disc/box accompanied by your email address written on a piece of paper in the photo
3. Screenshot of your Social Club account on the GTA IV page showing that you have played the game in the past and have generated progress/statistics
4. Photo/scan of the back of the game manual with the code clearly displayed
5. The activation serial key typed into the text body of the request
6. The IP address of the computer in question (What Is My IP ® | Shows Your IP Address.)
7. Your Request Code (This appears in the key activation dialogue box as automatically filled in. If you are having trouble finding your Request Code, please see *support.securom.com/PAunlock/index.php?c=1000&exp_serial=1)
8. Customer case reference # and proof of correspondence with SecuROM (if you have not yet contacted SecuROM directly, please write to
Support@securom.com)
9. Brief description of the problem
We review these appeals on a case-by-case basis, so please provide as many of the above items as possible. Note that Rockstar Games does not tolerate fraudulent attempts to gain access to extra keys or additional activations. Any serial key abuse will result in the license becoming permanently deactivated.
Also note that the limitations imposed by SecuROM are different from those by Games For Windows Live. If you are experiencing an error message from GFWL about reaching the activation limit, please contact GFWL support directly to check the status of your key.''
There,all this is to be included.Be sure to include multiple photos-First time ,I mailed only two photos of very large resolution and got no response from them.I even asked them about what is wrong in my current ticket in a separate reply but still,no show.
I gave up and instead mailed R* for GTA IV.They were the ones who told me what to include,so in a way,they helped me out...You can skip points 7 and 8 above since I did not know what to do for AC,but I repeat,DO NOT leave out any other point.And do it ASAP,for on the steam forums ,people are already reporting that everyone has got GOTY for AC..
Well okay,I will wait ...patience pays the patient! 
