BTWiFi & BTWiFi-with-FON connection problem

[willbiddle]

Hi there. Have just got subsonic configured successfully on my PC connected by ethernet to a BT Homehub 3. Music streams OK to the PC. Have also installed isub on my iphone 4 and ipad 2. Music streaming fine on 3G, my home BTHub3 wifi, and my school's wifi. However, when I connect to BTWiFi or BTWiFi-with-FON, it won't connect to the subsonic server. Any ideas?