Cannot print custom sizes
I am using an iMac with OS 10.8.5. I have a Canon Pixma pro-100 printer. I can set up a custom size page (for ex. A6/4.5 x 6.25) in Pages or Illustrator but when I go to print it #1 with Illustrator I cannot even choose custom size, and #2 if I go to "Page Set-up" and create a custom size for it in "Manage Custom Sizes" it will pull the paper through without printing anything. I have spoke to Adobe and Canon, but no one can tell me what the problem is. I hope someone in here can??
Thanks.
iMac, OS X Mountain Lion (10.8.5)