Hey, i'm having trouble with my 4-wheel drive as the maintenance symbol is on the dash after i switched it from 4-high to 2 HI it didn't shift too, and the switch doesn't have light on it anymore also.

To be quite honest i never used my 4WD, this is my first time and i'm kinda freaking out about it, i tryed reading forums but no one seems to have the same problem, if some 1 can help out that'd be really appreciated