Set Custom Paper Size for Crystal Reports in ASP.Net

I developed a crystal report and fixed its siz to the following dimensions:

1) Width size = 9cm

2) Height size = 5cm

I installed an EPSON LX 350 and used it to create the page with sizes above.

When l rn my project in VB, its displaying very well and different labels are appearing fine. PRoblem comes after publishing the project. The labels are now defaulting to either A4 or letter sized pages. As a result differen records are now appearing on the same page. Please help. Im using ASP.Net VB.