MICR Font problem in spool

Hi, We are printing checks on MICR printer. In the botom of the check

we had check number, bank routing number, bank account number, these

are comming perfectly with MICR font when print online.

But if i create a spoll by using same printer, and print the spool

request to the MICR printer, MICR fonts are not effective. I just see

Check number, bank routing number and account number in regular font.

Can you please see if i need to go with some oss note or something.

By the way iam on 4.6C.