VintaSoft PDF .NET Plug-in Discussions

Hi,
I am creating a free text annotation. I the rectangle is created to the desired size (300 x 30 for example).
I created the the PdfFreeTextAnnotation and set the rectangle of the annotation.
When I add it to the annotation list of the PdfPage. The annotation on the page is about 60% larger than the rectangle size.
The zoom is set to 100%, and the resolution is 96.
Is there some kind of transform that I need to perform to get the annotation to show up as the correct size?
We are using the winforms version of the .net plugin.

Thanks