Thanks all for your help and postings.
Yes, there was a blank cart. I took it out and put in one of the 5 that comes with it. When that didn't work, I put in Juice. Still nothing.
It must have something to do with the charging of the battery.
I'll just take a chance and try to charge it again, but just not sure if I need to do it for the original 8 hrs., or for one hour. Good thing this kit has two of everything in it.