[MarkFL]

Some of those lines in red are redundant, as they are included in the class selector:

.fmarq_fixed {
	position: fixed;
	top: 0px;
	left: 0px;
	z-index: 100;
}

The others are likely particular to your custom style, which of course I can't possibly account for ahead of time.

And you now have no choice but to have the thing fixed.

It worked perfectly for me, but if I had a nickel for every time things work for me, and not for others, I'd be a very rich man.