Hi

I'd like some help please - I jailbroke my iphone about a year ago and have been quite happily installing apps since then - however the last three I have tried have all told me 'Your computer is not authorised' despite the fact that it is - any ideas?

It happily installs free apps downloaded through Itunes.

Iphone 4 running 4.2.1
ITunes 10.2.1.1

Thanks