Reply to multiple midifighter spectra issue HELP!!!

Hello everyone, first time posting and I need some serious help. I got my second midifighter spectra and everything seemed ok. But when I log off traktor pro it doesn't want to recognize my second unit when loging back in. Infact I have to go back thru the controller manager and reconfigure until it does the trick. I have checked the inport and out port. Any suggestions would be greatly appreciated. THX