download the patch
https://activision.custhelp.com/cgi-...i=&p_topview=1
search the knowleadge base of activision and and see if your problem is listed
https://activision.custhelp.com/cgi-...p_sort_by=dflt
update your sound cards/videodrivers/direct x
This game is very buggly like the temple of the elemental evil (another game made by troika before they were out of business)