Which Humax firmware version are you using on the HDR-FOX T2? Last time I tried iPlayer was working with 1.03.12 (but not with early versions) but that will be a few months ago.
The T2 is on FHTCP 1.03.12, update 07/02/2014 Nicomm Version 9.3, loader Version a7.33
The TV Portal takes ages to load, hangs on with a grey letter box, been like that for over a couple of years.