Error importing files with BlackBerry Desktop Manager

I am packaging a BlackBerry application for desktop installation (i.e., .ALX and .COD files). However, I am having some problems:

I am seeing an error "There was an error importing files. No additional application can be found. Your file might contain applications that already exist in the application list, are not compatible for your device, or have erro开发者_如何学Gors".

What could be causing the problem?

Please look at to the image