R4 SDHC problem

Okay, so I have this card:
http://www.r4sdhc.com/r4sdhc.aspHowever, the firmware for it doesn't work (I tried 1.34 along with older firmwares, they all didn't work). All I get is a black screen after loading.
What's even weirder is that the 1.18 firmware for original r4 works perfectly on it.Anyone have an explanation of what's wrong with my card?Btw, when trying to run pokemon white on it, I get a white screen after loading the rom. I have tried almost all firmwares possible, still got a white screen. The problem is probably my card, or micro sd. If you know what's the problem please tell me.

I have the EXACT same problem!

I found the solution to our problem! Our card is actually a r4 new. Google the latest firmware for it (1.23 iirc) and use RGF latest multi-card upgrade and it should work!

Thanks, it works!! but can I use Action Replay with this method?