twain is bloqued when scannig image

[chakmed]

I’m using twain in Qt/VC++ 2005 application.
I call the scan DG_CONTROL,DAT_USERINTERFACE,MSG_ENABLEDS
with ShowUI = false , the progressBar of the scan is dispalyed ,
but it still bloqued at 0%,

I have an MFC application witch do the same thing but it works well.

can any one help me ??[/img]

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