Good game but keeps crashing

Fun game but after playing for about 5 mins the game starts crashing at the beginning of a race and makes me loose the entry fee. At first wasnt bad but now the levels im on have a 1,400 entry fee and Im loosing money fast. Usually stops crashing if I stop playing for a few hours but starts doing it again after about 5 minutes again!!!!

Rvm88 about Trial Xtreme 4 Moto Bike Game, v1.7.5