Rendering In Sony Vegas Pro 12

Well here is the problem.
I managed to render my videos in 1920x1080.
But i cant render in 4096x2304.

It wont let me type in those numbers.The limit is 1920x1080.

So,i'd like to know whats the problem there.

Does this solve your issue?

So my limit is 2048x1080 now.
But i want my video to render like this:


Nevermind,found the solution.I had to render my video as an .avi file.