Completely stumped on a bind issue

Here's the code (Field names changed to protect the innocent):

         Field Name:
                <cfinput type="text" name="FieldName" id="FieldLookup" autosuggest="#ValueList(queryOne.queryValue)#" autosuggestminlength="1">
         Field Two:
                <cfselect name="FieldTwo" bind="cfc:cfc.MyCFC.function({FieldLookup@change})" display="ResultField" value="OtherResultField">
                    <option value="">Select Below</option>
                </cfselect>

The form is in root/siteroot/forms/ and the cfc is in root/siteroot/forms/cfc/

Now here's the issue.  On loading the page, the CFC is found just fine, I know this because if I change the path or name it hard errors.  When it tries to run the bind, however, I get "Error invoking CFC /MyCFC.cfc : Not Found [Enable debugging by adding 'cfdebug' to your URL parameters to see more information]"

I ran it through firebug, and it is trying to call root/MyCFC.cfc.  So I changed it from a relative path to a direct one.  It still ignores everything but the CFC name and tries to call it from the root directory.  The root directory runs a completely different website, so I can't just throw the CFC there and call it a day.  I've searched for hours and found a handful of people with what sounds like the same issue, but not a single solution.

Can anyone tell me what the hell is going on with this call?