QR code in AX 2009

Hi,

We are facing problem when string to be encoded while string size is more than 110 characters in QR Code.

Using below link we are trying to generate QR Code on Sales Invoice.

community.dynamics.com/.../generating-qr-codes-in-ax-2009

Up to 110 charters it's working fine but if we add more fields then neither getting any output nor error. Is there a string limit. How to resolve this.

Thanks in advance.