I should add further more to this, that I did some of my own PD in an attempt to fix this, and I had some success, but still having an issue whilst connecting to this app when not connected to wifi.

I tried a numerous set of checks in relation to the iPhone itself. I attempted the obvious, reset the phone, no joy, I then did a Hard Reboot of the phone, yet again however this problem persisted.

In the end I had to restore my phone back to the original settings I had on my iphone4 and low and behold it started working. (Or so I thought) it works fine whilst at home, and connected to my wifi, yet the same issue returned as soon as I went onto either 3G or 4G?

I will continue my own PD and try and fix this, and post it up here if I figure it out, but if anyone has any ideas or things I should try in the meantime that would be fantastic!