Flex Viewer 3.4 Search Widget Error

I'm using ArcGIS Viewer for Flex3.4. This search worked in previous versions but now it does not.
I've look at everything I can think and I'm still receiving the following error when running the search:
[RPC Fault faultString="Invalid or missing input parameters." faultCode="400" faultDetail=""]
I'm sure I'm overlooking something simple but I can't see it.
I have other searches against string fields working on the same feature class/rest point. The only difference with this search is that the field is a integer type:

DRAINAGEBASIN ( type: esriFieldTypeInteger , alias: Drainage Basin , Range: [-1, 999] )

Here is the search:
<name>Drainage Basin GM</name>
<url>URL LEFT OUT ON PURPOSE</url>
<expression>DRAINAGEBASIN = '[value]'</expression>
<textsearchlabel>Drainage Basin (example: 453) =</textsearchlabel>
<titlefield>FACILITYID</titlefield>
<fields>
<field name="FACILITYID" alias="Facility ID"/>
<field name="SUBTYPE" alias="Subtype"/>
<field name="YEARINSTALLED" alias="Year Installed"/>
<field name="STATUS" alias="Status"/>
<field name="POSITIONALACCURACY" alias="Positional Accuracy"/>
<field name="DiameterFix" alias="Diameter (in.)"/>
<field name="MATERIAL" alias="Material"/>
<field name="SIZEDIMENSIONRATIO" alias="Size Dimension Ratio"/>
<field name="RECORDEDLENGTH" alias="Recorded Length (FT)"/>
<field name="UPSTREAMINVERT" alias="Upstream Invert (FT)"/>
<field name="DOWNSTREAMINVERT" alias="Downstream Invert (FT)"/>
<field name="SLOPE" alias="Slope (%)"/>
<field name="DRAINAGEBASIN" alias="Drainage Basin"/>
<field name="LINING" alias="Has a lining?"/>
<field name="INSTALLEDCOST" alias="Installed Cost (LF)"/>
<field name="GRAVITYINSPECTION" alias="TV Inspection"/>
<field name="COMMENTS" alias="Comments"/>
<field name="SOURCEDATA" alias="Source Data"/>
<field name="HYPERLINK" alias="Record Drawing"/>
<field name="VIDEOINSPECTIONDATE" alias="Video Inspection Date"/>
<field name="VIEWCENTER_ID" alias="VIEWCENTER_ID"/>
<field name="VERTICAL_DATUM" alias="Vertical Datum"/>
<field name="CASING" alias="Casing?"/>
<field name="SHAPE.len" alias="SHAPE.len"/>
</fields>
<orderbyfields>FACILITYID ASC</orderbyfields>

Any help would be greatly appreciated.
I'm thinking about creating a string field and copying the data (drainage basin values) over to it.