Visual Studio Freezing when Class View window is open

Hello,

we are a team divided in two different places. The jazz server is located where the biggest part of the team operates, and the other part of the team works in an office connected through a geographic dedicated line to the jazz server location.
We have planned to operate with RTC and the jazz platform through the visual studio plugin installed in Visual Studio 2005. We are doing some evaluations about this way of operating on our C++ projects and solutions. The people working remotely experiences a freezing of Visual Studio editor when changing any header file while the class view window is open. The people near Jazz server location are not affected by this problem. The freezing lasts some seconds and we are pretty sure it's due to some job done by the RTC plug-in; uninstalling the RTC plug-in, Visual Studio and the class view go back to its standard responsiveness. Our dedicated lines, are quite broadband and we can use videoconference without problems. Is the visual studio plug-in so network demanding? Is there any work-around or option configuration that prevents Visual studio from behaving in such an undesirable way?

Thanks,
Rosario Varriale.