modal cfwindow submits once without error but not again error displayed

I've added a link to my cfgrid that allows me to add a record.  Once "add record" link is selected, a modal window pops up.  I'm able to insert a new record, but when i try to insert another record using the same "subgroup_id", I'm getting the following error:  "ColdFusion.Ajax.submitForm: error submitting form, id: addUserForm : Element subgroup_ID is undefined in ARGUMENTS." What can I do to resolve this issue.  Please see code for 2 files below. admin_subgroupnames.cfm <script> function updateErrorHandler(id,messae) { alert("Error while updating\n Error code: "+id+"\n Message: "+message); } function addLink() { ColdFusion.Window.show('addrecord'); } function saveSub() { ColdFusion.Ajax.submitForm('addUserForm', 'subgroups.cfc?method=addSub', resultInsertHandler); } function resultInsertHandler() { ColdFusion.Grid.refresh('doctableGrid', true); var aForm=document.forms.addUserForm; aForm.reset() } </script> <!--- Display Grid ---> <cfform> <cfgrid name="doctableGrid" width="100%" format="html" pagesize="20" striperows="yes" bind="cfc:subgroups.displaysubdivisions({cfgridpage}, {cfgridpagesize}, {cfgridsortcolumn}, {cfgridsortdirection})" delete="yes" selectmode="edit" onchange="cfc:subgroups.editSubData({cfgridaction}, {cfgridrow}, {cfgridchanged})"> <cfgridcolumn name="group_id" display="no"> <cfgridcolumn name="subgroup_id" display="no"> <cfgridcolumn name="subgroup_name" display="yes" header="subgroup_name"> <cfgridcolumn name="group_name" display="yes" header="Division"> </cfgrid> <a href="javascript:addLink()">Add Record</a> </cfform> <cfwindow name="addrecord" modal="true" center="true" width="630" height="400" resizable="true" title="Add New Record"> <cfform name="addUserForm"> Division: <cfselect name="group_id"                             bind="cfc:subgroups.getgroupnames()"                             display="group_name"                             value="group_id"                            bindonload="true" /> Subdivision: <cfinput type="text" name="subgroup_name" size="70"> <cfinput type="reset" name="Clear" value="Clear Entries"> <cfinput type="button" name="addUser" value="Add" onclick="javascript:savSub();"> </cfform> </cfwindow> Subgroups.cfc <CFCOMPONENT output="false"> <cffunction name="displaysubdivisions" access="remote" returntype="struct"> <cfargument name="page" required="yes"> <cfargument name="pageSize" required="yes"> <cfargument name="gridsortcolumn" required="yes"> <cfargument name="gridsortdir" required="yes"> <cfargument name="filtercolumn" required="no" default=""> <cfargument name="filter" required="no" default=""> <cfset var subdivisions=""> <cfquery name="subdivisions" datasource="--"> Select sd.subgroup_id, sd.subgroup_name, d.group_id, d.group_name FROM subdivision sd Inner Join division d ON sd.group_id = d.group_id <cfif ARGUMENTS.gridsortcolumn NEQ "" and ARGUMENTS.gridsortdir NEQ ""> ORDER BY #ARGUMENTS.gridsortcolumn# #ARGUMENTS.gridsortdir# </cfif> </cfquery> <cfreturn queryconvertforgrid(subdivisions, ARGUMENTS.page, ARGUMENTS.pageSize)> </cffunction> <cffunction name="getgroupnames" access="remote" returntype="query"> <cfset var groupname=""> <cfquery name="groupname" datasource="--"> Select group_id, group_name From Division ORDER BY group_name </cfquery> <cfreturn groupname> </cffunction> <cffunction name="addSub" access="remote" output="false" returntype="any"> <cfargument name="subgroup_id" default="#CreateUUID()#"> <cfargument name="subgroup_name"> <cfargument name="group_id"> <cfset insSub = ""> <cfquery name="insSub" datasource="--" result="insResult"> INSERT INTO subdivision(subgroup_id, subgroup_name, group_id) VALUES('#Arguments.subgroup_id#','#Arguments.subgroup_name#', '#Arguments.group_id#') </cfquery> </cffunction> <cffunction name="editSubdata" access="remote"> <cfargument name="gridaction" type="string"> <cfargument name="gridrow" type="struct"> <cfargument name="gridchanged" type="struct"> <cfif isStruct(gridrow) and isStruct(gridchanged)> <cfif gridaction eq "U"> <cfset colname=structkeylist(gridchanged)> <cfset value=structfind(gridchanged, #colname#)> <cfquery name="team" datasource="--"> Update subdivision Set #colname# = '#value#' where subgroup_id = '#gridrow.subgroup_id#' </cfquery> <cfelse> <cfquery name="team" datasource="--"> delete from subdivision where subgroup_id = '#gridrow.subgroup_id#' </cfquery> </cfif> </cfif> </cffunction> </CFCOMPONENT>