96 t100 standard 4WD front wheels

[T100N.H.]

I got my right rear tire stuck in the mud. The left rear tire was on a sheet of ice. I figured no problem, I'll just engage the 4WD and let the two front tires on dirt pull me out. No matter what I tried, I couldn't pull out. It felt and sounded as though the 4WD was engaged, and both back tires spun together. The two front did nothings, they wern't slipping at all. Also, the green light on the dash that usually goes on once the 4WD is in effect wouldn't light up. Any comments, suggestions, knowledgw on this would be greatly appreciated. I've never had a $WD issue with the T100 and I've never got it stuck before.

Thanks

Conway Matthews