Is the other booster still connected to the hub using the Ethernet cable?
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I have never used VM boosters (I prefer to use my own wireless equipment) so someone else needs to comment...
... but is it perhaps broadcasting a separate SSID with a different name - if so you will need to change your devices to that one as right now it looks like they are connecting to the normal Hub wifi and not the booster's. Do you have a wifi channel scanning App that you can look at upstairs and see if you can see/identify any new SSID being broadcast from the booster?
-------------------- John --------------------
My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.