I did online check in for CSR a few days ago (arriving the 29th) however even though it gave me a choice to put in a Casitas room request it, it denied it. So i tried Ranchos, denied, tried Cabanas, denied. Soo it says, "We can not fulfill your room request, please call CRO."
What does this mean? I am not picky about where I get put. Should I still call??
What does this mean? I am not picky about where I get put. Should I still call??

I guess I'm not understanding why the OP is trying to put in a request if it doesn't matter to them what section they get. If I'm missing something and there is something important to request then I'd agree with the PP about calling to have it noted on your reservation.