[chirp_users] Issue Loading to a KenwoodTH-F6A

Hi all, I am new to Chirp so forgive the nooby question. I have a file in both CSV and Chirp format that I am trying to load to my F6A. I cannot load either file because I cannot activate the upload option from the menu nor Crtl U. I can download from the radio with no issues. Any suggestions? Joe, N9JCQ