Updated my dsi to 1.4.5U, Acekard not working

I updated my dsi to 1.4.5U, and now my Acekard 2i won’t work on it. Is there anyway I can fix or update this so that it’ll work on my dsi again? Or will I have to buy the r4i gold?

I am extremely challenged in this kinda tech stuff so I would really appreciated if I got clear steps on how to get my Acekard to work