hey did you get the solution?

I got the same problem as you, just changed from the Dlink router, and the hypptv is not functioning.
It did on the first 4 days, then suddenly it shows no signal.
but when I tryied the old router, hypptv works perfectly again. :/

already updated to:
3.15.30 Build 140912 Rel.66929n

still the same.

Oh actually, I just managed to solve the problem 2 hours ago.

1st, tried to sized down the MTU value doesn't work. In fact, I raised the MTU value to 1492 and disable the IGMP Proxy on the LAN setup. (I did this after refer back to the stock Dlink router configuration)

But what really the problem was, I put a little bit more force of the cable and wag it up and down in the LAN 1 port and suddenly the connection become clear for all channel

I didn't know if your problem is the same as mine, but I did notice the port was a bit loose whatever cable I use tho.

have you tried checking the cable properly? maybe try forcing a bit more on the cable at both end.

My HyppTV still working up till now without problem tho.

I did nothing else with the router except using the latest firmware available on the Malaysia site.