I have a jailbroken 2.0 with cydia. The appstore was working fine, and I bought a few games and downloaded a lot of free apps. Suddenly, It won't let me update any of the apps I bought. It downloads, then fails to install and pops up a dialog box that says "unable to download apps, they will download during next sync" INstalling new apps sometimes works. Itunes also fails to install them with an error. What's going on?