[Dx4win] Sudden printer error

[N3SL at aol.com]

OK, I printed QSL labels last evening.  No problem.
 
Tonight I went to print more, and when I click on the "Print" button, I  
immediately get a error message "Unknown Paper".  Clicking "OK" to clear  the 
message box then gets me another: "Access violation in module  MIMFF5_Q.DLL  
 Read of address 00000006C"
 
Anyone have a clue what this means?  I've done nothing to the computer  
since last evening....
 
Thanks for any assistance.
Steve