JQuery and CFC

I have a jquery/CFC solution that does a lookup but I am getting

I get "Unsupported Operation. Check application log for more details. " when I try to include the result.    If I don't include the result, I get the else showing every time which makes sense since 1 doesn't work.   I am using the jquery date picker too with that field.

CFC:

<cfcomponent output="false">


    <cffunction name="getCoupon" access="remote" returnType="string">
        <cfargument name="classdate" type="string" required="true">

        <!--- Define variables --->
        <cfset var data="">
        <cfset var result="">

        <!--- Get data --->
        <CFQUERY NAME="getCoupon" datasource="ds">
	select couponcode from coupons where testdate1 = '#arguments.classdate#' or testdate2 = '#arguments.classdate#' or testdate3 = '#arguments.classdate#'
</CFQUERY>

    
        <!--- Got it? --->
        <cfif getCoupon.RecordCount eq 1>
            <cfset result=1>
            <CFELSEIF getCoupon.recordcount eq 0 and len(#arguments.classdate#)>
            <cfset result=2>
            <CFELSE>
            <CFSET result=0>
        </cfif>

        <!--- And return it --->
        <cfreturn result>
    </cffunction>

</cfcomponent>

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Jquery:

 $(document).ready(function() {


		//result texts
	
		var checking_html = 'Checking...';

		//when button is clicked
		$('##datepicker').change(function(){

			$('##proctor_availability_result').html(checking_html);
				check_availability();
		});

  });

//function to check  availability
function check_availability(){

		//get the username
		var testdate = $('##datepicker').val();

		//use ajax to run the check
		$.post("testdate.cfc", { testdate: testdate },
			function(result){
				//if the result is 1
				if(result == 1){
					//show that the username is available
					$('##proctor_availability_result').html(result + 'You do not need to provide proctor information because you are sitting for your test at a scheduled location.');
				}else{
					//show that the username is NOT available
					$('##proctor_availability_result').html(result + 'You must complete proctor information prior to sitting for your exam but you do not need to complete this information to submit your registration.');
				}
		});

}
 

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Form

<TR><TD valign="top"><strong>Test Date</strong><img src="RedStar.gif" width="10" height="16" alt="Required" border="0">:</TD><TD><input type="text" id="datepicker" readonly name="classdate" value="#dateformat(getreg.startdate, "mm/dd/yyyy")#"></TD></TR>

<TR><TD colspan="2"><div id='proctor_availability_result'></div></TD></TR>

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