Blackberry bold 9900 time zone problem

Hi guys I bought the BB bold 9900 unlocked and set up BIS but the probelm is the time zone I changed it to my country time zone and turn off auto timezone update but after 5 hours or less it changes it self to USA timezone I don't know why it changes and I turned off auto time zone update

is it possible that the computer you sync with is on a USA time zone? Unless unchecked, DM will sync the time with your computer.

Originally Posted by sjsplaty

is it possible that the computer you sync with is on a USA time zone? Unless unchecked, DM will sync the time with your computer.

Your 100% right my brother's laptop is sync with USA tine zone and I used it for mobile internet and music sync BTW why it goes with DM while I already set the TZ in the BB it self. Thanx sjsplaty