[chirp_users] Need help with kenwood th-k2

Hello, I am having trouble using CHIRP with my kenwood th-k2.  When I first try to download from radio I get nothing.  It just sits there.  If I try to download a second time I get an error that access to com port is denied.  I am using a mirkit ftdi cable that has worked well with my boafeng radios and CHIRP.  I have the PC setting on the th-k2 set to "on".  What am I missing?Thanks for any help. Susan WB5JFL