Problems with Changing the Public IP Block used for squid

I'm hoping that someone can point me in the right direction here.
I've got a shore wall firewall with a squid proxy server sitting in a
DMZ. We were recently asked to change our public IP block. The two
blocks are setup while we make the switch. I've made the changes to
the interfaces without DNS records for direct connections via IP and
such and everything there is working. The problem is when I made the
interface IP change to the interface used for the proxy server.
I currently have eth2, eth2:0, eth2:1 and so on for the public IP
block Ips. It so happens that one of the aliases "eth2:5" was left
with an IP from the old block when I made the change to eth2 which is
the IP used for internet via the proxy. When I changed eth2 to use an
IP from the new block for the proxy server. It immediately started
using the eth2:5 for it's connection which contains the only IP left
on the old block.

If someone could point me in the right direction on this I would be
grateful.

Thanks,
Dave B.