Text size using the web viewer in Crystal Reports Visual Studio 2010

I have an application developed in Visual Studio 2010 which use reports edited with Crystal Reports 2011 and are generated using de Crystal Reports for Visual Studio 2010. The reports are used in both, windows application and in a web service belonging to the same solution. When I view the reports through the windows application the viewer shows the reports properly, but if I view the same reports through the web explorer (IIS7 local web server) the text fields or formula fields donu2019t respect the size assigned during the edition process. As a result the text overlap with each other. I try to install the last SP1 for CRVS2010 but the trouble persist.

There is any solution or special configuration for the web server viewer to avoid the problem?

Thanks.