I'm trying to upload a CSV file to my radio.  ubfortunately the upload to radio option is greyed out.  Why?  what gives?  I can download from the radio, which produces a saveable .img file and allows me to export a .csv with all the channels.  I am unable however to either paste into chirp from another source or write the radio using the .csv file I exported.  what gives?  how do I import a .csv and output a .img file to the radio?

Eric