3D Plugins dont work

[SandwichSlayer]

I downloaded Project 64 on my Windows XP, and I loaded it up, exited to play some weird Mario 64 romhacks, but I started getting error messages, ignoring them at first, but as I clicked on the ROM, it said that my graphics plugin was not working. I checked it, and it was using the default Jabo plugins, and yet, no Waluigi's Desert Quest. Why did this fail? I don't think it was the OS, because my friend used P64 on his XP. PLEASE HELP ME!