access mailing label message

[fwit]

I'm using Windows 7 and Access 2007. Since installing Windows 7 I get the following message when I try to print my regular mailing labels and they won't print. Anyone know what it means and how to get around it?

you entered an expression that has a invalid reference to property

[NTC]

well it means what it says - - the real question is what changed to trigger this? Probably the simplist/fastest fix - is to make a new print button - and abandon the old....