Nintendo DSi specific roms

Hi people! Sorry for my bad english, but i'm german. Here is my problem:
I bought a DSi an a R4i flash card a few weeks ago. The majority of the nds games work, but when i download exclusive dsi roms and put them in the r4i they don't work. They appear in the r4 initial screen, but when i click them the screen goes white and the dsi stops working.
Can anybody please help me?

The DSi enhanced games are problematic on most flashcarts, only some actually work well. CycloDS, Acekard 2i, DSTTi with the Unofficial firmware, are a few I know of (not all work on the DSi though).I'm not sure if there is any alternate firmware for the R4i, or what version of the R4i you have. You should start by making sure you have the latest firmware for your card.