Upgrade VisC++ compiler

Hi, I am a newbie to all this programmer stuff. I am a physics student doing some computer simulations. I was trying to use the special function atanh from boost libraries but couldn't. The error message reads d:\boost_1_28_0\atanh.hpp(77) : error C2989: 'atanh_helper1_t<T,0>' : template class has already been defined as a non-template class Some advised me to update my VisC++ ver 6.0 compiler. How can I do that? Does anybody out there have any better advise? Thanks sen