I posted here about this a couple of months ago.... I'm still stumped

Trying to connect to D-Link WiFi router with XDAIIi, have done it many times before on
an identical router, which I believe to be configured very similarly, if not identical

It's not using any MAC address filtering, I've checked network key, and every other bloody setting, but in my PDA it says the network is available, and it tries to connect. I'm getting pretty agro with this thing, do SSID's have to be in caps or include/exclude any particular types of characters? It shouldn't, but would the O2 be not accepting an SSID that a computer will for any reason??
I am determined to get to the bottom of this....... any help is greatly appreciated

Cheers, James