Strange network (wifi) issue with SMP

WD Legacy Products WD TV Live Streaming
1

I have been running 2 WDTV Live (gen2) boxes for a few years with no issues at all. 1 machine is in my living room, connected to a Netgear Router by Ethernet. The other is upstairs and connects via wifi using a DLink-140 usb wifi adapter.

Never had any problems at all.

But, a very strange thing is happening since I connected the SMP in place of the unit downstairs. When the new SMP player is used all works fine. But once I power it off and go upstairs the older WDTV Live is unable to see the network shares. It seems to pick them up (sometimes) but will not connect - and they they disappear from the list. Strangely, my mobile phone also loses the wifi connection at the same time. If I reboot the router then the old WDTV and my phone can then see the network and all is fine - until the new SMP unit is turned on. Then it happens again.

The new SMP is running the latest firwmware, as are the WDTV Live (old version) and my router.

I have tried a second new SMP and the same happens.

I am really confused as to what is happening. Does anyone have any ideas?

2

Did you remember to change the name on one of the boxes?  They will both have the same name by default, which will cause all sorts of issues.

3

Yes. Did that - One is WDTVLIVESMP, the other is WDTVLIVEUP.

4

Different IP addresses?

5

Yes. I have tried iving them both static IP addresses, and also letting them get assigned an IP by the router. Same happens.