my game crashed

[PotatoChips5]

i downloaded roi this day. at first every thing went so normally but after 5 mins or so the screen goes black and i cant move the cursor. i could only see the icons and the map but my charcter and the pngs were invisible. then i get kicked from the game. i just want to know if the problem comes from the game or from my computer. i play on koroshimo as a ranger. thanks for your help.