What version of traktor goes stable with R1?

I'm having trouble using my R1 with midi, after 2 hours of use the program it starts to slow down and choppy music. On occasion I also stops identify Deck A and all its functions to do this either leaves or put me play with the mouse. I want to know which version is best Trakor walks with r1 for ACER instalarcela my pc, windows 7, corel i5, 4GB RAM and disk 500. thank you