My Computer Got Locked Out Of Msp

My sister was just logging in, then summit popped up (that picture i just posted) so i tried to log in my account, but it said the same thing! NOW I CANT GET ON MSP! I dont know wat me or my sis has done, i watch my sis on msp, she doesnt break the rules. I dont either! WAT DID I DO TO YUH, MSP???