Uppercase in any connection means you're connected to RIM data services. Lowercase means you're not. So you want to see UMA, EDGE, GSM instead of uma, edge, gsm.
So you're right that it is the reason your BB Messenger and Facebook isn't working. Since you're on Orange, you should search the forum for your router or Orange and see what comes up. I personally think the UK routers are just different than in North America which causes problems. But I hardly see anyone replying back when they fix their problem so can't be sure.