Simple GridView Style

This is so simple I'm sorta baffled as to why I'm having such issues with it - In my resource dictionary, I'm trying to keep my users from dragging and dropping the column headers of gridviews in the application, so I'm simply doing the following:

<Style TargetType="{x:Type GridView}"><Setter Property="AllowsColumnReorder" Value="False"/></Style>

But this throws that generic target of an invocation exception.

I'm sure this is a so simple it's stupid type of thing, but since it's evading me, I'd appreciate some help if anyone knows why it's throwing an exception.

Thanks,

Aj

If at first you don't succeed, skydiving is definitely not for you!