Derek, OK, my bad I see it in the main config.xml now. The issue is that you have no fields setup to go to the datagrid.<layer>
<definitionexpression></definitionexpression>
<enableexport>true</enableexport>
<name>Rough Rider Corridor</name>
<url>http://ArcGIS:6080/arcgis/rest/services/Test/Test/MapServer/3</url>
<expressions>
<expression alias="Pipeline Name" textsearchlabel="Search Pipelines by Name...">
<values>
<value prompt="Example: 31Bugs" userlist="31Bugs,42nd Buford,48Jackson,52Boots,52Delrome,52Ox,52Pyramid,
54Borsheim,56Sukut,57Strand,58Arnson,62Irgens,62Kalil,62Sam,64BCD,Abe,Aune,Aune-Savage,Bennett,Charbon,East Fork,
East Main 1,East Main 2,East Main 3,Green,Knoshaug 14-11-1H,Lucy Hanson,Marcia and Jake,Missouri,Mrachek,North-South Main,
Olson 20-29,Papineau,Patent Gate,Rangeland,Rose,Russell-Irwin,Sjol,South Alexander,State 36-1,Timber Creek,Trenton Anderson,
Trenton Oil,Trenton Water Line">SEGMENT_NAME LIKE '%[value]%'</value>
</values>
</expression>
</expressions>
<graphicalsearchlabel>Use one of the graphical search tools to select Pipelines</graphicalsearchlabel>
<spatialsearchlayer>true</spatialsearchlayer>
<titlefield>SEGMENT_NAME</titlefield>
<fields all="false"><!-- Notice I had to remove the closing slash from here -->
<field name="ANC" alias="ANC" visible="false" gridfield="true"/>
<field name="SEGMENT_NAME" alias="Pipeline Name" visible="false" gridfield="true"/>
<field name="PROJECT_NUMBER" alias="Project Number" visible="false" gridfield="true"/>
<field name="Shape.STLength()" alias="Length" visible="false" gridfield="true"/>
</fields>
<links/>
<zoomscale usegeometry="true" zoompercent="2"></zoomscale>
<autoopendatagrid>true</autoopendatagrid>
<queryattachments>false</queryattachments>
<relates/>
<symbology>
<simplefillsymbol color="0x0000ff" alpha="0.5">
<outline color="0x00ffff" alpha="0.8" width="2" />
</simplefillsymbol>
</symbology>
</layer>
