IPCop 1.4.21 Changed Subnet now Exchange and OWA not working

Hello All,
I really need some help here.  I had a requirement to change the green interface IP address and network subnet from 192.168.1.x to 192.168.50.x.  I made the subnet change successfully, modified the IP addresses of the DC and OWA edge server accordingly, and changed the DHCP scope.  Then I changed all the firewall port forwarding rules from 1.x to 50.x wherever they were present.  Now, the exchange server is not receiving any emails and OWA does not work. What am I missing?  Please help me!
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can you access OWA and telnet port 25 internally from LAN computer? To make sure your exchange and OWA is working fine after changing LAN subnet.
mhv88Author Commented:
I can't open up anything from the OWA edge server, the exchange server is working fine.

I know what the issue is, but I can't seem to fix it.  The issue is with IPCop 1.4.21.  I was able to change the IP address via root access to the machine, and modify the port forwarding rules via the GUI. When I try to make changes to the DMZ pinhole settings, I click on the pencil, make my changes, click the update button then the screen just goes white and I can't do anything except go back. When I refresh my changes are not saved. How can I get around this?

try change via console / root access with command "setup"
than choose "networking" - "address setting" - "orange"
choose DONE when ok
mhv88Author Commented:
Hi All,

I was able to find the issue with the help of the admins on IPcops.com.  The previous admin had changed the permissions on the dmz config file.

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