Ubuntu :: Screen And Vim (256 Colors) Background Color Rendering?

I'm using xterm/screen/vim, and set them up to 256 color mode. Everything went well, except when background color for the theme I choose is not black.

Here's the theme I use in this example:[URL].. Here's the situation: as long as I only use vim, the background is well rendered, meaning everything is grey in vim background. But when I try this with screen, the background is back to black, and only the text get some kind of highlight with the background color.Here are the magical lines I added to screenrc:

Code:
term screen-256color
attrcolor b ".I"
# Tell screen how to set colors. AB = background, AF=foreground
termcapinfo xterm 'Co#256:AB=E[48;5;%dm:AF=E[38;5;%dm'
# Erase background with current bg color. Not needed if TERM=screen-256color
defbce "on"

Colors are well rendered in 256 color, I only have a problem with this background. Anyone knows how to 'fix' this?