[Koha] Koha Barcode Generation

[Pedro Faria]

I am using koha 2.2.5. Does anyone, using this version or other, have 
barcode generation working? If so, could you aswer attaching 
barcodeGeneration.pl?
All I get so far (following previous help) is a file recognized as HTML 
wich I must open in web browser to be able to open it in pdf view and 
all I see is a small label , no black and white bars!
Please, any help!
Thanks to all