Problems with new application on 6720

[Tarchi Stefano]

Hi, on my 6720 I have a problem when I try to install a new application.
The application is tested and ok, but when I try to install throught BlackBerry Desktop Manager 4.0 I receive the error J:0x0000000A .
The firmware on BlackBerry is 3.6.0.38
Have you some ideas how to resolve this problem ?

Thanks

Stefano