Default [Q] auto rotate screen not working on htc inspire 4g

hi guys... if u dont mind i need some help with my htc inspire 4g.. its autorotate screen is not working its been almost a year since i bought this phone and in just few months this problem came up.. i cannot go to some any htc store to have a check up for my phone bcoz i work in the ship. ive tried the advices of the previous forums but it did not work.. i hope there is a genius one who can give a help for this.. thank u so much