Barcode image does not display in fpdf cell

Hi, I found your class and find it very useful and exactly what I needed.

I am trying to use your class to put the barcode images of my records from the database in pdf format so the user of my system could print the list with the barcode images. My concern is, I am having trouble when I want the barcode image to be in a cell. When I run it, it doesn't have any error but it just doesnt display the image, my cell for the image is blank.

I just want to ask how to manipulate the barcode from your class so that I could display it the way I want it to be in a cell. Or if I cannot do so, do you have any alternatives that you could suggest? Thank you very much.