Reply to using multiple controls in traktor

im wanting to use my vestax typhoon and korg nano pad in traktor but having trouble using both. the typhoon is mapped and working fine but cant seem to map the the nano pad to work at the same time. not sure if there interfering with eachother or im making a simple mistake which id imagine is going to be the case. anything i should know for using multiple controls in traktor or is it simply a case of mapping the 2nd and 3rd etc