Printer won't print font correctly

We have this check printing software that uses a special font called Micr that prints the special line of code at the bottom of a check. This is set up on one computer that can print the Micr line successfully, but two other computers that I need toset this up on do not work. They print the Micr line with a jumble of numbers and symbols. This has to be a problem with the font because they are all using the same printer drivers. It is a TTF called AdvMicr and gets placed into the \windows\fonts\ directory when you install the program. I'm just wondering if there is something else that needs to be done such as installing the font to the printer or the like. Any help would be greatly appreciated because their support line wants me to pay just to ask a simple question.