Garmin Mobile XT problem. I have been using it satisfactory for some days. However beginning yesterday, the backlight on function did not work.

My cell phone backlight control is set to turn off after 5 minutes to conserve battery power. When I installed the Garmin mobile XT, the 'backlight ON' of it can override the backlight control of the cell phone to keep XT backlight continuously on during my journey but beginning yesterday, for unknown reason, the backlight control of the cell phone become perevalent. After 5 minutes, the backlight turned off so did the software!!

Anyone encounters this and knows of ways to overcome that?

Thanks.