Migration to Visual C++ 2010, availability of x64 builds

Hey ! I’ve been using these builds and I seem to have an issue while opening windows. Whenever I try to open it, it says that no displays are available and that I should specify some in my Config.prc file.
I already have some in there: pandadx9, pandadx8, tinydisplay and pandagl. This prc file used to work with 1.8.1, the dlls bear the same names and are in the executable’s folder. Everything seems in order to me. Is there something else that could be wrong ?