Editing Drivers License information

How can I edit the name field for driver's license information?  Illinois is rejecting my electronically filed return because "Taxpayer Driver's License signature fields must be entered exactly as shown on the Illinois Drivers License.  Enter each field exactly as it is on your IL Drivers License: First Name, Middle Name, Last Name, Suffix, and weight."  I suspect there is a problem with the name field.  The software allows me to edit the license number, expiration, and ISS fields, but I cannot edit the name field to add a middle name.