Photoshop Creative

Howdy:
Last night I was traying to get 3 images transfer from LR2 to CS3 to make an HDR image and was getting these messages:

1- "The file "0809_Fsted_011.NEF is offline or missing." This message came up when ever I try to select the image in LR2.

2- When trying to send to CS3 from LR2 I then got this other message.
[b]"?:0: attempt to index a nil value."[/b

Is this telling me that even though I have the images in my LR2 library they are actually not there?
Is this problem created by the camera or this is related to the memory card?

I have had that happen to me a few times and for me it was because I moved the orginal to a different place. I just deleted them from LR and then re-imported from the new folder.

Thank you Susie, this is the first time this weird thing happens to me. I can't remember what I did or where I put the originsals. I guest I have to go back and re-shoot, good thing is and old building that is not going anyware,