Also, what is this conversion?
What scanner are you using?
I wrote barcode support into my app years ago and your process sounds a little flawed or you have a failing reader.
Bob
Hi, all!
I had been having problems with importing my barcode into Photoshop then converting it to a pdf. After talking to my printer, they suggested using InDesign. The barcode (I've used both pdf and eps) looks crisper when I export it to a pdf, but, it still won't scan! I'm just using the place function in InDesign and exporting it to a printable pdf format. I'm quite new to designing for publishing, so I can imagine there are some things I'm missing. Any help would do!
Thank you, in advance!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic