UserProfilePropertyName Filter Descriptor Not working

Any help on this would be great, I haven't seen anyone doing this yet.  I have a filter descriptor on my ReadList. This Descriptor is of type UserProfile.  I've set up a custom property to get the UserProfileProperty of AccountName.  AccountName is a profile property exists in my CA.

I have a type descriptor of "IN" of type System.String to accept the filter.  It also has a custom property of UserProfilePropery of AccountName.  Below is my method.  What am I missing here?????

 <Method Name="ReadList">
              <FilterDescriptors>
                <FilterDescriptor Name="CurrentUserName" Type="UserProfile">
                  <Properties>
                    <Property Name="UserProfilePropertyName" Type="System.String">AccountName</Property>
                  </Properties>
                </FilterDescriptor>
              </FilterDescriptors>
              <Parameters>
                <Parameter Name="trainingEventEntityList" Direction="Return">
                  <TypeDescriptor Name="TrainingEventEntityList" TypeName="System.Collections.Generic.IEnumerable`1[[TenetSupportPortal.BCSModel.BdcModel1.TrainingEvent, BdcModel1]]" IsCollection="true">
                    <TypeDescriptors>
                      <TypeDescriptor Name="TrainingEventEntity" TypeName="TenetSupportPortal.BCSModel.BdcModel1.TrainingEvent, BdcModel1">
                        <TypeDescriptors>
                          <TypeDescriptor Name="TrainingEventID" IdentifierName="TrainingEventID" IsCollection="false" ReadOnly="true" TypeName="System.Int32" />
                          <TypeDescriptor Name="EventDate" IsCollection="false" TypeName="System.DateTime" />
                          <TypeDescriptor Name="Status" TypeName="System.String" />
                          <TypeDescriptor Name="LoginName" TypeName="System.String" />
                          <TypeDescriptor Name="Title" TypeName="System.String" />
                          <TypeDescriptor Name="EventType" TypeName="System.String" />
                          <TypeDescriptor Name="Description" TypeName="System.String" /></TypeDescriptors></TypeDescriptor></TypeDescriptors></TypeDescriptor></Parameter>
               <Parameter Name="UserName" Direction="In">
                  <TypeDescriptor Name="UserNameTypeDescriptor" TypeName="System.String" AssociatedFilter="CurrentUserName">
                    <Properties>
                      <Property Name="UserProfilePropertyName" Type="System.String">AccountName</Property>
                    </Properties>
                  </TypeDescriptor>
                </Parameter>
              </Parameters>
              <MethodInstances>
                <MethodInstance Name="ReadList" Type="Finder" ReturnParameterName="trainingEventEntityList" ReturnTypeDescriptorPath="TrainingEventEntityList" />
              </MethodInstances></Method>