ASP.net Modification

I have an asp.net project that I need a modification done to. I am using alot of CSS in this project. I am using it to control the font size of the screen in a certain situation. The problem is when I use a graphic as opposed to a cell shade it does not display the graphic appropriately. This should be a simple project. The work must be done on my system using teamviewer as it is way to big to send. Needs to be done ASAP