Everytime I try to install an application i've downloaded onto my computer to my tattoo with the HTC synch application installer I get this message ; "Installation was not successful. Please make sure the application or the file is compatible with your mobile phone and enable "unknown sources" in your phone's settings -> applications area to allow installation of non-market applications" I've tried it with the youtube.apk and the photoshop apk. I assume all you do is download the .apk file, then find where it is on your computer and select it? Well I've made sure I've enabled unknown sources in my application settings. I can't think why it's doing this. Any Ideas?