I read the posted link below in the hopes that it would solve my "disappearing CF card" problem. My new x51v sees the Lexar 1GB SD card just fine; but the Lexar 512MB CF card has only been "seen" one time by the x51v, and I'm not sure what the circumstances were that allowed that to happen
http://www.aximsite.com/boards/showthread.php?t=112638
As this post suggests...I just got a brand new x51v and it can't "find" the CF card that is installed. I know it at least knows the CF card is there because when I pull out both the SD and CF cards from the unit (when it is off), and re-install just the CF card, the unit turns on (like saying, "Oh, hello."

) But it still doesn't see the CF card.
I'm going to keep looking through postings on people's ideas, but I'm at a loss. Can someone help?