I have a Nikon D70. Camera doesn't read CF.

I have a Nikon D70. Camera knows there is a compact flash but can't read it. Compact flash works in a different camera so that isn't the problem. Have tried resetting everything. The problem began when I was or had reformatted a CF. I may have opened or tried to remove it when green light was on. I tried several CFs and I get an error message that tells me it knows the CF is there but can't read the data. At this point, I can't taake photos, format, or anything.