i could only guess that either your computer's drivers dont work or if you have some add-ons installed they may be corrupting your game.
im sorry i cant other anymore help. i had a similar problem that my computer wouldnt play blockland (v.8 & v.9) due to the drivers incapable of updating to play it. eventually when v.10 cam out my computer could load, so also make sure that you are trying to load the latest version