Can't get R4i SDHC to work

Can anybody help me? I bought NDS Lite with this flash cartridge. It's R4i SDHC, upgradable (www.r4i-eu.com)
I tried every HDSC firmware I could find, but it wouldn't work. Can anybody help me with that?
That happens every time.

Try sorting through this list : http://www.linfoxdomain.com/nintendo/ds/ Maybe it's there.By the way, flash cart related problem should be posted in : https://forum.romulation.net/forums/flashcart-help.104/