Why is my ProofControl label printed on 3 labels?

How to install the Dymo LabelWriter 450 in ProofControl

Problem: When printing on the Dymo LabelWriter 450 using labels 99012 Large Address each
ProofControl label is printed as 3 labels.

Solution: When printing on the Dymo LabelWriter 450 the driver for Dymo LabelWriter 400 needs
to be used.

Steps:

1. Navigate to: C:\Program Files\GMG\ProofControl\LabelPrinter\Dymo LabelWriter400 and doubleclick the *.exe file.
2. The Dymo Label Software is installed. Follow the instructions of the installation wizard.
3. After the installation of the Dymo Label Software, you will be asked to connect the printer. After connecting the printer, the printer driver is automatically installed. Click Finish to complete the setup.
4. Open Windows Start menu >Control Panel > double-click Printers. Right-click your label printer and select Properties from the context menu.
5. Advanced > select New Driver... 
   
   
6. Install the driver for Dymo LabelWriter 400
   
7. Open General > Printing Preferences > On the Layout tab, select Landscape as Orientation.
8. Click the Advanced button in the right corner of the dialog > Under Paper Size, select 99012 Large Address > Click OK to confirm your changes.
9. Select the Dymo LabelWriter in ProofControl.