wow.. Ok so all your issues are your network and have nothing to do with TIPI.. you say something about the guest network vs the lan, the issue there is entirely that guest is isolated from the local equipment
you need to be on the same network for it to work.. you need to be able to connect to the device to use it..
ti browser: myti99.com - CREATE NEW ACCOUNT. easy
ti browser: http://www.stuartconner.me.uk/ti/ti.htm#internet_web_browser