Wrong size and content of dialog after second show() Follow

I extended DialogWrapper to create status dialog.

<![CDATA[
StatusDialog dlg = new StatusDialog(this.getProject());
dlg.setMessage(status);
dlg.show();
]]>

after this code executes, I see dialog in right Size and with right content. Than I do

<![CDATA[
dlg.close(0);
]]>

It disappears. Now, if I try to show it again,

<![CDATA[
dlg.show();
]]>

dialog appears in wrong size and has nothing inside. I am forced to recreate this dialog newly ever again.

Is there any possibility to avoid that? Thanks!