we are having a very serious problem with banned member

we've had to close down our shout box
hide in our chat
she keeps coming in as guest.
we banned by email and ip address.
But she has a dynamic ip address-if you ban one she comes in with another.
She is harrasing all the admins.
wreaking havoc on the board.ppl are not going to want to stop in with all this going on.
She filled up our shout box till we had to take it out
Talking reasonably has no affect on this person.
It's getting out of hand now.It was this kind of behavior that got her banned in the first place.But how can you ban by ip if it's dynamic.
What can we do?

Use this method

* and the first part of her IP

kilsek ..if i had a million i'd give it to you
thank you,thank you,thank you!!!
my admins will thank you
you are welcome at our board anytime!!!

glad to help