Remove colon for mandatory formitems

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GWT-2.5.1 version
Firefoxv3.6

I tried to remove colon from all the formitems.
Using
setTitleSuffix("");
I can remove only the coln for non mandatory items.colon is not removing for mandatory items.

Sample code:
final DynamicForm form = new DynamicForm();
form.setWidth(1300);
form.setMargin(25);
form.setNumCols(4);
form.setAutoFocus(false);
form.setStyleName("Form");
form.setHiliteRequiredFields(true);
form.setTitleSuffix("");

I have attached the screenshot for reference.

Attached Images

screenshot.jpg (44.7 KB)