[chirp_users] Help

I have been working with a friend to help him us CHIRP.

On his computer (windows7) when I click Radio at the top of the screen opens the pull down window but it does not do anything if I try to click download. I can not download a file from the radio.

If I open a file and have on the screen it will not let me upload to the radio. There is no error message or any indication at all on the screen. What can I do. Dave