The 4x4 light on my landcruiser is, for some reason, not turning off. It was used recently (went offroading) but when I was getting back onto the main road, I unlocked the hubs and when I pressed the button to turn it off, the light stayed on. Any idea why this is and how to fix it?

I know for sure that the 4 wheel drive is off. But the darn light just stays on. Help?
@Chris

Well, the button pops back out so I don't know whats actually stuck. What do you suppose it is?