Barcode on smartforms

Hi,

I'm working on bar-codes to be generated through smart-forms.

I got many useful links on sap help for this. I took an example online from the below link and developed barcode using my own logic on pick slip.

Step-by-step New Barcode Technology for Smart Forms - Code Gallery - SCN Wiki

When I executed my bar-code from se73 after giving the "bar-code data", i'm able to get a bar-code and the corresponding data/number below it.

But, when I execute the same through smart-forms, i'm not getting the data/number below the bar-code. I have given the code logic for this

"concatenate "delivery #" and "material number".

Please help me with this.

Thank you.