Got 3 new R4 III sdhc with 8gb sdhc card from pandawill.com. Have done 7 others with no problem. I downloaded the newest 3.11 firmware from www.r4dsl.net as the package suggests. When I turn it on it doesn't recognize the card and takes me to the same screen as if I didn't put in a card at all, says no ds card inserted. It did this on all 3 cards, usually when I have the wrong firmware, it says loading forever, but dodn't even get that... please help