Can you tell me how you are generating userId and key parameters to this request?
I'm working on something similar but I don't know how to generate these two params to get the valid xml response you are getting.
Code:
http://www.foxsoccer-iphone.premiumtv.co.uk/streaming/wab/multiformat/index.html?partnerId=1704&eventId=xxx&userId=????&key=???&xmlerrs=true