DS4308 OPOS Encoding QR-Code

Hello,

I have a small problem with the string returned via Opos. It works miraculously in the test app. In the application attached with C # unfortunately not.
And that is the string prefilled with ""; \ u0010 \ u0003 \ 0 ".) In the test application this works without problems.
Unfortunately I can not understand in the source of the test application what is encoded where,
DataEventEnabled and DecodeData are true and seem to go too.

It is a ds4308 scanner.

Please help.

THx