Printing Postcards

[Joe Salimao]

Hi guys,
I recently bought a Canon laser printer to use for my direct mail campaigns and I bought some postcards to try out. Unfortunately, when I tried printing them the printer didn't do to well. It seemed that the printer was having a hard time grabbing them because the margins where so inconsistent. Some of the postcards had the beginning of the text all the way in the middle. I am thinking because I am using a glossy card stock that it is slipping in the roller.
For those of you who print your own postcards what do you use? I would use a mailer service but it is so much cheaper to do it yourself.
I currently use a Canon Imageclass printer and a 14 pt card stock with a glossy back.
Any ideas?
Joe Salimao