Nelson, put the cup back to restore humidity, and hope that the recover.  Next time, to avoid this problem; instead of lifting the cup all the way out, stick a toothpick or pop-sickle stick between the 2 cups to give a slight air gap.  Keep the gap small at first, and slowly increase the gap (like up to a chopstick next).  I used to do that with orchid that I just took out of it's bottle.

Also, for other cuttings that haven't leafed out yet; instead of covering and sealing it air tight (100% humidity), use a cup with a hole punched on the bottom.  That should give it the extra humidity that it needs to grow faster, but at the same time keep it down enough that it'll already be slightly hardened to the air, and at the same time keep mold from growing on your cuttings.

Hope this is of some help.

Thanks ccc1 I had done what you said i had a pensil between the two cups and everything was fine and now this morning when i got here i checked one of the cuttings is fine the other the leaves shriveld up like a prune , i doubt very much those leaves will ever come back.

Ok, I have just received several cuttings.  Some of them are green (this years growth) some are a softer wood, but not green, maybe last years growth? and some is hard so I'm guessing older growth more than a year or 2.  I've got them all wrapped in wet newspapers and in ziplock bags.  Where is the best place to keep them?  My choices are in the house, perhaps in a window sill (temp inside house is usually around 70-74); in the mostly uninsulated garage (no heat, no a/c), or outside under the deck so it's out of the sunlight but it's in the heat.  I live in NE Texas and the temps are reaching 98+ and the humidity is usually pretty high. Also, how often should I check them to see if them are too wet or too dry?  Any advice would be very appreciated.   

I would take advantage of the heat and humidity outside. I would also try a couple different methods, baggie, in water or even cup a few right now. Be sure to use a loose porous soil mix Check at least every other day

Thanks, BLB.  Between 2 trees, I have probably 10 cuttings so I think I'll take your advice and try some of all 3 methods.  I'll try to keep up with posts on how they are doing.

Jules, I'm in SE Texas and the last cuttings I started a month ago I put in moss in a tupperware and left them in the garage. The heat had really good roots on them within a week.

Tami, That's awesome!  I'll try that with a couple of them.  Thanks.