Problem with Printing on Windows with a dymlo lablewriter

Dear Sir od Madam,
I've got a problem with printing under Windows 7 on my Dymo Lablewriter 400.
The Problem is setting or saving the right papersize.
If I'm selecting the right papersize in the QPrintDialog the winPageSize returns "182" and the printing is perfect.
If I'm selecting the printer again, and set the WinPageSize before, there is still the wrong Pagesize selected in the Dialog.
I've tried to set the winPageSize after closing the Dialog, I also set the papersize (setPaperSize(QSizeF(57.15, 31.75),QPrinter::Millimeter)
But the Printer isn't printing correctly. He is only printing a part of it.
I also added a lot of Debug outputs, they look the same, but the print output is diffrent
I added a samleProject. EANWidget.printThis() is the printing Method

Greetings,
Sebastian Albers