If the blades will not engage or rotate on your Dixie Chopper zero turn radius mower it is most likely due to a belt problem. Either the belt tension is too loose and needs to be tightened or the belt is worn or broken, which would need to be replaced. Some zero turn radius mowers have more than one belt, so check all of them for wear and tension issues.
Also, make sure you clean out the deck area to remove any grass and debris that can build up after every use. This build up can cause the belt to get stuck and not move.
The model and serial numbers on your Dixie Chopper zero-turn mower can be found on the frame of the mower.
NOTE: if you need a part for the small engine in your Dixie Chopper zero-turn mower, there will be a separate model/serial number for the engine. Here are the small engines that are available in your Dixie Chopper mower. Visit the page of the engine you have to find out where the model/serial number is located for your small engine model: