cfselect bind not working

I have the following code in a template called test.cfm:-

<cfform name="MoveDomain" method="post">

Accounts:-<cfselect bind="cfc:cfc.accounts.Function_SearchAccounts()"  bindonload="true" value="str_AccountNumber" display="str_AccountNumber" name="AccountNumber" />

Package:-<cfselect bind="cfc:cfc.packages.Function_GetPackagesBind({AccountNumber})" bindonload="false" value="int_PackageID" display="str_FriendlyName" name="Package" />

</cfform>

and this code works fine on it's own with the relevant cfcs.

However when I put this page into a framework it doesnt work. Even stripping everything out.

My application.cfm has this in :-

<cfsilent>

          <cfapplication           name                              =          "appname"

                              sessionmanagement          =          "yes"

                              sessiontimeout                    =          "#createtimespan(0,1,0,0)#"

                              applicationtimeout          =          "#createtimespan(1,0,0,0)#"

                              setdomaincookies          =          "yes">

  <!--- DSN for control panel --->

          <cfset request.dsn                    =          "dsnname">

</cfsilent>

<cfsetting showdebugoutput="yes">

<cfinclude template="layouts/lyt_header.cfm">

and the layouts/lyt_header.cfm is blank.

If I leave the lyt_header.cfm file empty then it all works however if I put even just a '1' in that file then the cfselects stop working and no data is displayed - just empty drop downs

Appending cfdebug on the url give me the following error:-

window:global: Uncaught SyntaxError: parseJSON (http://xxxx2/CFIDE/scripts/ajax/package/cfajax.js, line 804)

Any ideas?