Module width misalignment using fixed width

[nostalgia]

I can't seem to figure out why my cmps module's width is not the correct width.
My forum's display is fine,
This is just happening in my cmps.
I Fixed width to the left and right column.
But column width has problem.
I wanna alignment column width all the same with fixed width.
Can someone please help me figure out what setting needs to be changed to fix this.
I've tried everything... See below attached

* At Internet explorer 6.0

Thanks.