The “Force Paper Size” setting basically tells the printer to use A4 (in your case), no matter what the default is. It shouldn’t affect the printing of the footers. What exactly are you seeing on your end? Is there a slight clipping? Are the footers missing altogether? Can you try to set “A4” as default paper size in the printer driver? Does that change the behavior? Can you try to delete the printer settings file (*.LSP by default)? Does that change the behavior?
It might make sense to escalate this question to our support team as we can exchange detailed log files in this case.