oscam crash & restarts

i have ubu1204 with the autocccam/oscam script have updated oscam followed from on here tivusat is card & is in omni . oscam can run anywhere between 2 mins & 1 1/2hrs then crash some times starts quickly & is ok other times cant find reader. im guessin oscam confs are ok as it reads
any ideas on why this happens?
thanks for any ideas
been playin with this for days now & no progress
sometimes card timesout 5000ms other times just stop & crash