Thank you. Specifying the source port was the problem. I did notice that the gui said a source port isn't needed most of the time. I just thought that in this case, since it was for the admin panel, it would be a good idea to limit the rule as much as possible. I guess not.
BTW, thank you to all of the devs for this wonderful product. I dropped my custom Gentoo install using Shorewall that had worked for me as a firewall/router over the past 3 years. I didn't have any problems, but I thought I would try something different. I'm glad I did.