tapelist file

[teo73]

Hi,
  i' m trying to label a tape with the command
 amlabel -f "config" "string" and the answer is "amlabel: could not load
tapelis "PATH_TO_TAPELIST"
   i' ve tried with an empty tapelist file , without tapelist file and
with a tapelist file with only ste "string" ;  also in my amanda.conf
file as "labelstr" i got only th "string": So what' s up !!!!
   please HEEEEEEEELP!
       Teo