Reply to Bizarre MF Classic (plus IG) issues with Traktor

I use a MF Classic (with IG) with an S4 with Traktor Pro 2--sometimes when i plug in the MF (and make sure it's secure) it works perfectly and sometimes I can't do anything with it. There are times where unplugging and replugging it will solve the issues, and times when it won't. Is there something I'm doing wrong? Is there a surefire way to get it to boot/work properly every single time? My S4 loads properly every single time without needing to go through such a mess. I don't know what I am doing wrong with the MF.

Thanks guys.