help!!! clicking on the back end

I am having a issue while I am riding with the back wheel clicking. It feels like something with the coaster brake or the hub, (there is a little bit of play when i apply the brake and it seems like it might be slipping a little when i start peddling again.) Does anyone have any suggestions on where I should start trouble shooting? And yes I have checked for something rubbing or hitting the spokes. The bike is a 20 in lowrider with 144 spoke rims and lowrider tires. Please help if anyone can, before i start tearing the back end apart!!! lol thanks  

 I don't know.

Did you ever figure this out? Let us know so we know too  

Well I took the hub apart, re built the whole thing, packed it with marine grease and it seems to have done the trick. The brake is a little loose still but i haven't had time to adjust the coaster brake as of yet! After tearing the hub apart, the quality of the of the parts used by "said brand" is not that impressive! After visiting my local bike shop we ended up using high end parts by a well known road bike manufacturer! I would recommend any one with the same issue just buy a whole new back tire unless you are very savoy with re building hubs and coster brakes