It sounds like you are trying to use the 941 Form in PayWindow 2011 which there is a warning message telling the user it cannot be used until the 2011 form is released.
941 Form Warning.jpg
The 2010 Form is useless in PayWindow 2011 until the 2011 Form is released by the IRS and we add it to PayWindow and if you need to print reports from your 2010 data, you must use PayWindow 2010. And you must set the date in PayWindow to 12/31/2010 as well so you are not trying to print this year's data.
Reinstall PayWindow 2010 from this link:
http://zpay.com/downloads/paywinsetup2010.exe
Do what you need to do and then reinstall 2011 using the Update checker.
Paul Mayer
ZPAY Payroll Systems, Inc.