Real VNC Java issue

Hello everyone,
I have been using Real VNC for a while now and occasionally connect over the web if I don't have the ability to use the VNC Viewer. I recently upgraded my Linksys WRT54GS firmware to DD-WRT, which is great! Only problem though is now I cannot connect to any of my home PCs behind this firewall. I do have another internet connection at home through Verizon as a backup, which came with one of those generic Westell wireless routers. I can connect via http through that fine. I also use Hamachi on all my PCs, which I can connect to as well.

I know that this is not a port forwarding issue as I have had this configured successfully in the past without any issue and the http port is the same as the default VNC port (5900). There must be some setting on my router that is not allowing the connection to fully get through.

Just to add, I can get the prompt for the initial connection which shows the ip address of my firewall, but will not get to the password prompt.