Raj,
Yeah sometimes the problem is with the state registry and not AC/STC. That's happened to us before. I thought TX was just terrible at this stuff but I guess we're not the only state terrible w/ data exchange!
Do you get emails from the state? Or get the data quality reports from them? When the state was the problem, they eventually sent an email out to notify about the problem. I then forwarded the email to AC and apparently that was helpful for AC/STC.