Font rendering quality barcode

I have a strange problem. When I use the old RDC to print a report, everything is ok.

When I use the current .NET viewer and print from the preview, everything is also ok.

Only when I use the Report.PrintToPrinter method directly then the barcode is wrong.

Here are two examples:

OK:

Wrong:

You can see that also the width is wrong.

The rest of the report is ok.

Any hints on what I can check?