cant log in, window keeps poping back up

[nateko]

i type in my email + pass and click log in but the log in page just disappears then reappears with a little window saying

"Fiesta.bin
Fiesta.bin has encountered a problem and needs to close. Sorry for the inconvenience"

......idk what to do.. my account works on my friends computer but not mine.. please help


thank you :(