WDDX packet parse error at line 1, column 1. Content is not allowed in prolog..

Question

We have a CFC page that was working fine before moving to CF9 from CF8.  Any ideas on why it is no longer working?  It is not processing at all now - just giving us this error.
<cfcomponent displayname="Checks For Email Address" output="true" hint="Checks for an Existing Email">
               <cffunction access="remote" name="CheckInData" returntype="boolean" description="Checks Email and Returns True if Email Address Exists" hint="Checks Email and Returns True if Email Address Exists">
               <cfargument name="Email_Check" type="string" required="true"/>
               <cfquery name="data" datasource="datasource" dbtype="OLEDB">
            SELECT                 
                              Email
            FROM                    
                              EmailTable
            WHERE
                              Email=<cfqueryparam value="#Trim(arguments.Email_Check)#" cfsqltype="cf_sql_varchar" />
            AND
                              Company_ID='#company_ID#'
        </cfquery>
        <cfif data.RecordCount EQ 0>
               <cfreturn false>
        <cfelse>
               <cfreturn true>
        </cfif>
    </cffunction>

Answer 1

@cover,
I see two things you might change, but I don't know if they will solve the problem.  First, you don't need the "dbtype" attribute anymore with CFQuery, unless it's dbtype="query".  Second, it's possible you have a race condition on your query results variable ("data").  You might add a line right below the CFArgument tag:
<cfset var data = "">
This will make the "data" variable local to the function.
Other than that, I can't see anything obvious.  I'm not at all versed in WDDX, so maybe someone else will have some better ideas.
-Carl V.