FileForums - Vice City

Hi everyone
I made a backup of my GTA Vice City and a funny thing has happened. It seems ok then when I play for a little while Tommy Vercetti (the lead character) starts walking sideways and I cant stop him however I try. I used Alcohol to burn it and it installs ok and runs with a NOCD patch.......but a little bit into the game and he starts walking sideways! Has anyone else had this problem? Any help would be greatly appreciated as I have started to do mods and seem to be reinstalling the game all the time and would like to keep my original in good condition.
Thankyou for any replies and Merry Christmas to all.