Does anyone know how to get rid of an extra bar down the middle of my frameset

Does anyone know how to get rid of an extra bar down the middle of my frameset?

It's right down the middle of the index page of my web site and I don't want it there. The other frames are right where they're supposed to be. Does anyone know how to get rid of it? Ten points to serious helpful answers only.

Other Answers:

provide the website so we can look at the source code...

but youre probably just missing a frameborder code...