My question involves bankruptcy in the state of: Arizona.

I filed chapter 7 in the state of Arizona in 2008. Some of the debt I had at the time was private student loans. I filed an adversary proceeding to discharge the debt because some of the loans were not true student loans. The adversary took several months to conclude, but in the end some of the "student" loans were discharged based on the argument that the loans did not meet the definition of a qualified student loan. A few of the private student loans survived the adversary proceeding the ended in 2009.

Now, when did the state of limitations begin on this debt? Is it the date I filed bankruptcy or when the case ended or some other time? I have not heard from the creditor since the bky until recently when a creditor mailed a letter asking for payment.