I have a problem in cfgrid bind attribute with stored procedure

my stored procedure is as follows. It works fine by itself

CREATE PROCEDURE [dbo].[usp_myproc]
(
@SectionID int,
@gridsortcolumn nvarchar(30),
@gridsortdirection nchar(4)
)
begin
xxxxxx
end

______________________
my component is
section.cfc
has the following function

<cffunction name="cfn_myfunc"
output="yes"
returntype="query"
access="remote">

<cfargument name="SectionID" type="numeric" required="yes">
<cfargument name="gridsortcolumn" type="string" required="yes">
<cfargument name="gridsortdirection" type="string" required="yes">





<cfstoredproc
procedure="usp_myproc"
datasource="#application.dsn#" returncode="no" >

<cfprocparam value="#arguments.SectionID#"
type="in"
cfsqltype="cf_sql_integer"
null="no">
<cfprocparam value="#arguments.gridsortcolumn#"
type="in"
cfsqltype="cf_sql_varchar"
null="no">
<cfprocparam value="#arguments.gridsortdirection#"
type="in"
cfsqltype="cf_sql_varchar"
null="no">



<cfprocresult name = "RS_myfunc">
</cfstoredproc>

<cfreturn queryConvertForGrid(RS_myfunc, page, pageSize) />


</cffunction>

_____________________________________________________
my cfm page is as follows

<cfform name="tryme">
<cfgrid name="mygrid",
format="html",
sort="yes",
bind="cfc:component.data.section.cfn_myfunc(1,{cfgridpage},{cfgridpagesize},
{cfgridsortcolumn},{cfgridsortdirection})",
pagesize="7" ,
selectmode="row">

<cfgridcolumn name="OrgUserID" display="No"/>
<cfgridcolumn name="FIRSTNAME" header="FIRST NAME" >
<cfgridcolumn name="LASTNAME" header="LAST NAME" >
<cfgridcolumn name="OrgUserEmail" header="Email" >
<cfgridcolumn name="AgreementDate" header="Agree Date" >


</cfgrid>
</cfform>
______________________________
it does not work
It works if I used an embedded query instead of the stored procedure
how can I resolve that

Thanks