Nikon memory card won't read?

I have a nikon d200 with a sandisk memory card and every time i put it in it says "CHR" i tried recharging the battery, reset my camera, reseat the memory card, formmatted the memory card and even got a new memory card. Its still doing this and i'm leaving on a trip tomorrow/

CHR, if you look in your user manual on page 194

You will see that recharging your battery, resetting the camera does not do anything.

My guess is that you may have a bent pin in the card slot (rare, but it can happen if the card is placed into it incorrectly.

Well this could come from one of 2 problems that spring to mind…

1. You do not have the correct software installed on your PC, as thus presents a problem in reading said memory card, especially if you are using non-specific or generic software.
Ensure the software you are using is for the nikon d200.

2. The memory card may also be faulty, if you feel this may be the case, i suggest having a dealer or repairer take a look at the card.
Tip: Some photo labs have self service units for most types of digital cameras. Drop in and try establishing if the memory card can be read.