Thank for the replies let me give some more information

I went to school in the US and worked under my employment authorization while in school and after I graduated.

Before that expired my employer hired a lawyer to sponsor me and do The paperwork for labor certification etc. This was just before 9/11. After 9/11 the normal processing times were doubled or tripled? I had confirmation from the labor cert etc, everything was sort of in process? The entire time I was working, paying taxes etc.

I have returned checks from the INS for my I 765, so at no time was I paid under table or was I hiding. I had a valid SSN, drivers license - I never felt that I was doing something illegal. At no time before I left did anyone say, I should leave or I should not be working etc.

In 06, I moved to Canada as there was no end in sight for the paperwork, all my lawyers enquiries could find out was that it was being processed or it was in queue.

In 07, I applied for a visitor visa and was given a 10 year one.

At the nexus interview the officer was pretty irate that I was applying, he seemed to be in a mood from the get go.

Things might be coming to a head anyway, I got a call from the US consul that they want to discuss my visa ...

Any suggestions?