I think what's happening here is that, even though technically green is cooler than red, you have a green for background that is not only a little on the bright side, but also on the warmer side, making it more powerful than the reddish clothing. Hence, making the background pop out more than the foreground. I guess try using a cooler green, blue green, for the background. Or, you can make a clothing on the orangey side.
Also, add more value on her. Make her a little contrasty.
Hope it helps,
Cheers!