Bind textblock text value from DB - silverlight

Hi I can a WCF ria webservice and silverlight app

I need to pull some text from a table and display on a button but it's not working

Here is the code
BorderBrush="Black" Height="75" Foreground="Black" Name="btnF1" Click="btnF1_Click">
                        <TextBlock TextAlignment="Center" TextWrapping="Wrap" Name="txtF1">
                         <Run Text="{Binding FunctionKey,Mode=TwoWay}"></Run>
                                                    <LineBreak/>
                                                    <Run Text="{Binding DispositionText, Mode=TwoWay}"></Run>
                   </TextBlock>                    
                    </Button>

I'm trying to Bind textblock text value from DB table in in  wcf ria service entity framework model silverlight  project

But it won't work
Help!!
websssAsked:
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apeterCommented:
Can i see your model call and how you are binding please ?

your model should have a property "DispositionText" and data source should be bind to the GRID in that page or  some element's "DataContext"
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