Hi, I have an R4iSDHC V2.0 DS Happy Box Upgrade v1.4 (The website on the flashcart says www.r4isdhc.com). It was working fine a while back but when I updated the firmware it no longer works. Normally my DS accesses the flashcart through this game icon called Top Spin 3 2k Sports. Now when I load it up it just leaves me at a white screen. I've tried many different versions of the firmware (both from the flashcart's website and Retro's Multiupdate and even Ysmenu/Wood R4) but nothing seems to work. Anyone has encountered such a problem or knows how to fix it? Thanks a lot.