I’ve got a HTC Touch Pro 2 from Vodafone. I want to install some applications on it, but when I attempt to install, I receive the message that ‘Installation was unsuccessful. The setting or program cannot be installed because it is not digitally signed with a trusted certificate.’ I’ve looked around on the internet at various posts, but haven’t been able to get anything to work, particularly with installing tools to fix the problem as I receive the same error message! Why I am not able to install Vodafone HTC Touch Pro 2 apps? How can I fix it? Any help would be great!