Firewall/NAT

I have a pc running m0n0wall 1.235. 6 network cards. If I modify a rule I see the message invalid interface name in rule 65. I see in: Lan 9 rules, WAN 44, DMZ 4, LAN2 4, PABX 1 and LAN3 1 rule = 63 rules. Am I missing something?
Thanks in advance.

I (with help from my son) solved the problem by going to page:
https://192.168.10.1:444/firewall_rules_edit.php?id=65  <- here I put the rulenumber
and I modified something.
After that the rule appeared in the webinterface, and I could delete it.

-jpf-