[chirp_users] CHIRP and BF-F9 not write with an error, why?

[IW2GJV]

hi just programmed my Pofung BF-F9  (like an UV-5R  ).....  with chirp

with no problems !


Today i  READ all ok , but i think to  WRITE into the radio , it say this 
error:


http://i65.tinypic.com/14bnngl.jpg

is the first time i see this error..... no problem before this day !!!

a Trick, if i end the chirp program, NOT read but  direct WRITE  ...
chirp not say to me this error....why ?

thanks best 73