Capturing larger images in Camera

[Anne Canon]

I have a Nikon D7000 and I am working on photographing various buildings in my area. In January I took some shot's of our arena the day after I bought the camera. When I uploaded the files to CS5 they were nice and big 70x50 in 300px/in. Which was great because I need to have large prints made. However, I took some recently and they are only comming up as being 21x14 in CS5.
I am shooting in RAW, so any thought you can give me would be greatly appreciated.

[Jordan Anderson (icywarm)]

Are you sure about the first size?

70" x 300 = 21000 x 15000 = 50" x 300

315,000,000

That is a lot of mega pixels!!! (307 for those dividing by 1,024 at home)

perhaps it was metric 70 cm x 50 cm and now is showing imperial in inches?

[Anne Canon]

Thanks for catching that. When I went back and looked at the info it was only 74 px/in on the first one, and 240 px/in on the second one

[Anne Canon]

So the question remains, what setting needs to be changed in my camera to keep things consistant? Obviously I want more pixals so the enlargment will stay nice and crisp.

Thanks