BAR CODE - URGENT

Hi frnds,

i am printing the bar code in sales invoice. it is coming but it is not recognising by the scanner of bar code. i feel that we are passing two values apart from sales invoice no, po no, .... those two values are ENTER and TAB key.

i got the enter key value, but i did not get TAB key value.

can u please give ur solutions/suggestions in this.

Thanks & Regards,

Balu