Random Weight Items On POS 2009

Hi

How Can I Add Random Weight Items With this BarcodeFormat (FFCCCCCXXXXXCD) in MS POS 2009?

FF: Flag (20-29 in store barcode)

CCCCC:(Item Number : #####)

XXXXX: (Quantity Or Weight)

CD ( CHECK DIGIT BASE ON EAN 13)

Example: 2210001123455 >>

10001 = Item Number

5 = Check Digit

Note: in Price embedded Barcodes Section OK Button Is Always Disabled (I don't know why I can't Add new barcode Format)(How Can I Enable it???)

Please Help Me

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