My guess is that you've specified the wrong converter type -
UnitConverter. Please note that
uint (short for unsigned integer), which is the property type, is not the same as
Unit (as measuring unit). Most probably trying to use the specified converter fails and that's why the property is ignored.
Please try specifying either an
uint is the C# alias for
System.UInt32) or no converter at all, as .NET is smart enough to figure it out in this case.