請教法居士：H1B visa in Canada

Hi,
I am on H1B visa and work as a software developer. I also just got my Canadian Green card. I've been to Canada three times before (without Canadian green card) to get H1B return visas (all about two years ago). All successful.
I am thinking of going to Canada again. What do you think of my chance of getting the visa now. Have you heard of any computer major people getting background checked?

Thanks a lot!