So finally today I was able to check my status online but only for I-765 and I-130, but nothing for I-485 (the case number cannot be retrieved). I thought most of you are able to view I-765 and I-485 but don't have any updates on I-130. Oh well, I guess I'll keep waiting and checking every day
I am in the same boat as you. My I-130 and I-765 online status have been working since the past 2 weeks but not the I-485. When I called to ask them why, I was told by a second level customer support agent that she could retrieve information about my I-485 on one of her systems and that it would probably starting working after I have done my FP.
In any case, I don't have too much faith on what those agents tell me so you might wanna call tomorrow and see what they will tell you.