Is the lift motor working?

yeah locko i'm sure we would have eventually gotten to that part but his post was rather vague, not enough information :o/

If you have drive power but no lift power,check the holding valve is locked off at the front of the machine.

Locko

first off what is the serial number of your unit?
secondly, always check the batteries and make sure they are charged, check the water in the cells and make sure they have water showing above the cell plates inside the cells. If you have to add water add it so it just covers the cell plates, DO NOT fill to the top of the cap hole, then run another charge cycle and check operation again.
other than this unless you give a unit serial number it will be difficult to give you any accurate information on how to troubleshoot this further.