I am using the Flexviewer 2.3.1 with Server 10. I am using Robert's Enhanced Search Widget however I have tried it using the out-of-the-box search widget with the same result.
<layer> <name>April Calls for Suspicious Persons</name> <url>http://dpgis01/ArcGIS/rest/services/Incidents_April2011/MapServer/0</url> <expression alias="DATE" textsearchlabel="Search Citations by Date" field="Call_Time" usedomain="true">Call_Time = date '[value]'</expression> <expression alias="NATURE" textsearchlabel="Search Citations by Date" field="Nature" usedomain="true"></expression> <expression alias="ADDRESS" textsearchlabel="Search Citations by Date" field="Street" usedomain="true"></expression> <textsearchlabel>Search by Address or HCAD Number</textsearchlabel> <graphicalsearchlabel>Use one of the graphical search tools to identify parcels</graphicalsearchlabel> <fields all="false"> <field name="Call_Time" alias="DATE" dateformat="MM/DD/YYYY" gridfield="true"/> <field name="Nature" alias="NATURE" gridfield="true"/> <field name="Street" alias="ADDRESS" gridfield="true"/> </fields> <titlefield>Nature</titlefield> <linkfield></linkfield> <!-- <webfield>HCAD_Link</webfield> --> <gridfields>Call_Time,Nature,Street</gridfields> </layer>