Wirelessly posted (8700g: BlackBerry8700/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)
Have you searched on that error message here? I'm not familiar with it or what you are doing, but odds are it has been discussed. Otherwise, the reference to the handheld software strikes me as a need to have the OS installed on the computer. Though maybe not exactly the same thing, see http://blackberryfaq.com/index.php/A...n_Loader_Error
EDIT: I glanced at the original message again and see it is 'handheld application' so I'm less sure now that this an issue of the OS installation on the computer.