Is there anyone from Colorado that has tried to get in-state tuition at one of the major universities?

I called Colorado State and first she said as long as I had the 12 month period I was fine, then she spoke with someone else who said I couldn't do it because I couldn't establish "legal presence" but I thought that was the one thing we can establish.

I did this over the phone because I don't live in Colorado, so maybe someone that went in person had better luck.