error message when trying to add applications

[shema1b]

i keep recieving a no sytem software was found for your device message when i try to add applications to the phone what am i doing wrong how are you supposed to add applications

[JSanders]

Welcome to the BBForums...

Read this and you follow the instructions, it will work:
Application Loader Error - BlackBerryFAQ (http://blackberryfaq.com/index.php/Application_Loader_Error)

Good luck.