Okay when i click the play button a tree bark or something like the play botton appears then disappears seconds later then nothing happens.
Help!!!!

Same thing for enders client i click run. bat cmd appears then disappears then nothing happens!

And all the other clients to.
I have windows 7 64bit with java 64bit plzz help!I tried reistalling it and evrything but still the same,i was playing fine the other day but now this happens!