Works OK for me with Safari on an iPhone. I suspect its either a local cache issue (try turning the phone off) or you have a saved incorrect password. Alternatively you have some odd characters in your username or password that are not being transmitted. Though I have to say, using a phone for web page browsing strikes me as an exercise in masochism.It says that the loggin details are incorrect.
I'm using the same username and password as here but no go!