200sr20

So I installed a Top Speed Shifter in my 03. My reasoning for buying a Top Speed shifter is that I put one on my SE-R and is works perfect!! On the Z however it doesn't like going into reverse with the shifter installed. its design is similar to B&M's. I would love to keep it because it does great in the forward gears. Any ideas.....other than taking it off, which I am considering at this point.