I have the same router and I tried to setup Hotspotsystem, but unfortunately it is not working. I really appreciate if you can provide details on how do you setup your router:

Version of your DD-WRT firmeware.

Setup actions to turn on Hotspotsystem there.

I think I'm almost there. I'm facing problem with the virtual SSID, I think it is not given IP address when I selecio the Unbridge option.

I really appreciate if you can help me..

Thank you very much!