Pitfalls when using CVS in windows

Hi all,

I am in C# development team. I am very very new to C# and for that Windows 
development. The lead developer have had problems with CVS using Tortoise 
CVS as the client. Our CVS is hosted on a linux. We are using pserver. Our 
lead developer and project manager have got so sick of the problems that 
they want to switch visual source safe. I feel uncomfortable because I 
think it is a backward step. Could it be that they are just not using CVS 
properly. What can I do to change their minds?

Thanks.