Barcode won't scan if Rendered Image is too small

Hello all

I'm using krysalis-barcode-1.0beta to render barcodes through a servlet.  Everything runs just great if I use the default height and with for the generated output but if I try to make the image smaller I run into two problems.  1.  My barcode scanner can no longer scan the image.  2. The human readable output doesn't seem to scale down in size with the smaller image.

I'm using an output type of png.  A height of 7mm and a width of .07 mm.  I've tried with and without greyscale enabled.

I've attached the code for my servlet in case that helps any.  The scanner will work if I use the example servlet provided in the downloaded pakage and I select svg but I would really rather use an image type browsers are more familiar with if that is at all possible.

Thanks in advance for any and all advice

Andrew Nelson