QLabel setText Problem

[pmabie]

Hello
I made a simple form in the Qt Designer, 4 QLabel's and 1 Process bar.
I am trying to feed the QLabela file name to be displayed in the my Dialog.

labelFileName->setText(filename);

labelFileName->setText(filename);

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no matter what I do, I just can't get it to print the line, the only way I got it to work was to place a statement after setupUI.

setupUi(this)
labelFileName->setText("Test");

setupUi(this)
labelFileName->setText("Test");

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My Question is , why doesn't my statement work.

Thanks for your time .

Patrick.