KM c224 duplex printing up side down

My KM c224 is printing in the second side (duplex mode) the page up side down. So first page is ok but verso page is up side down. I have tried many things including binding positions.
Any help is apreciated!
Dorin

 

well i will like to advise to do factory reset on your KM printer. though i haven't come across such problem.

please i am from Nigeria and in need of toner powder of this KM C224 or the cartridge.
can you help source for this toner.

you can email me via zekeri.enebi@yahoo.com