QAxWidget trouble with duplicate letters

[Psy_Duck]

Hi all again! I include card-reader driver in program by QAxWidget (i wrote about it in: this topic).
And i had (and have now) problem, that i solved how "create new object with control->use object ->delete object". It's works, but everytime need create new object and connect and it's so long. And i have hope, that you gives me some advice.
Problem: after connect to driver by it's uuid i have trouble with duplicate non-english letters that typed by keyboard (picture) and it's only in this Qt program.

1. This occurs only with the card-reader driver. Doesn't occurs if i connect file or other drivers.
2. I try change setControl (i mean first setControl("driver"), after setControl ("another driver or file") - no effect.
3. I try "QAxWid->control.clear/QAxWid->discconnect or clear" - no effect.
   That i think - 1) trouble ofcourse in driver; 2) i think me need something how "unsetControl"))
   Well, that can forum say ?