I just attempted a project with a sled for the first time. Same as tackytim's...3/4" thick project piece & 3/4" thick sled. The project in Designer is 3/4" thick.

After touching off the board, to measure the thickness, I don't get a "Board Too Thick" message. It just moves over to the sliding plate, bobbs up and down a few times (never making it all the way down to the plate), then gives an error to the affect of "Ensure Sliding Plate Is In Place. 1) Retry 2) Abort"

Any suggestions??