Separator pages fail to print after applying MS09-022 (KB 961501)
After installing MS09-022 customers may notice that they are no longer able to print Separator pages. This patch makes it mandatory that the separator files be present in C:\Windows\System32 folder or in a folder named \SepFiles which can be present anywhere. For example you can have the .sep files inside E:\SepFiles\*.sep. However even when these two conditions are true you may notice that the separator files are not getting printed.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2001854.