Hi,
Just got one of these myself...
To get a mobile working you will need to forward 34599 as well.
I am a bit hit and miss with the discovery app at the moment.
Still playing with the settings on the DVR....working at the moment with 1/4 ciff and 4fps.
You may also want to try MEye app which is free and also works with this DVR.
Just out of interest what OS are you using to get it working over internet explorer?
I have tried XP with IE and windows 7 with IE but both come back (after installing activex) device not found.
Let me know how you get on.
Mike