help

[chetmero]

i own a LG kg800 and i need help with the ring times, it ring about 10sec and then it hang up alone and i wonder is it cuz i put voice mail or i have to set something, and when i try to go in Calling>Auto Answer> Ringing times it has 3, 5, 10 sec but i Can't click OK on them or neither all other thing in Auto Answer mode.

help please? i want to make the ring time litle big longer, like 1min

Thanks