Wirelessly posted (8700g: BlackBerry8700/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)

I don't know anything about the app, but if it was working ok before, then try pulling the battery for 30 seconds or more (hard reset). If that's not the cure, then I'll defer to someone who is familiar with the app.