messenger sign in

hi...i have aproblem with messenger....everytime i logged on..its lways on...but i jus logged in...i have to turn it off always..is sumone else using my hotmail account....everytime i check it seens to be on..but im didnt logged in...and theres sumthing else..i didint report any problems here in december,,im surprise when i logged in here that iseen them,,i never report any problem..until now...i think sumone is using my hotmail...and i still have aproblem with my msn messenger.its still blocking my messenges when i send them on hotmail...so,i had to delete my contacts..until this is fixed...thanks..leah wes..