ST2 Tuner and CAV66s

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I have 2 CAV66s and a total of 12 zones.
I added a ST2 tuner and it works fine but I cannot seem to control it
I have plugged in the CAT6 to RNET ports and joined them all together.

When I use BLRussound to control the tuner I can see it changing the station, presets and banks on the keypad but the actual station is not changing on the tuner.

Any ideas?

[Blade]

I figured it out
I needed to set the source in the ST2 tuner