So many variables in this equation.  But  I have  an "incoming" adsl router ethernetted to another "Tenda" brand router with wifi.  All ok?- (can get internet from each unit)

Add to this an ethernetted Rotel Gateway stereo reciever.

Then an Ipod touch with a Rotel app installed.  Which should control the reciever.

The ipod app says it cannot detect the rotel reciever on the network.  Is there some ping test to do and or some basic settings to  ensure everything can see one another across the networK?

Thanks in advance.