Parameter Slow And Page Refresh

Hi,

I have a problem with the parameters in SSRS2005.
In fact I have for example a parameter month on a MDX request (See below). When I change the value in the listbox, Reporting services post the page and I am waiting 3s before to click on "view report"
Do you have an idea why this post is called ? For me there is no reason !!!



WITH

MEMBER [Measures].[ParameterCaption] AS '[DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].CURRENTMEMBER.MEMBER_CAPTION'

MEMBER [Measures].[ParameterValue] AS '[DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].CURRENTMEMBER.UNIQUENAME'

MEMBER [Measures].[ParameterLevel] AS '[DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].CURRENTMEMBER.LEVEL.ORDINAL'



SELECT {[Measures].[ParameterCaption], [Measures].[ParameterValue], [Measures].[ParameterLevel]

} ON COLUMNS ,


ORDER(

[DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].[CAL - Mois].MEMBERS,[Measures].[ParameterValue],DESC) ON ROWS


FROM ( Select ( filter([DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].[CAL - Jour].ALLMEMBERS,

CDate([DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].Properties( "CAL - Date" ))>= CDate(vba!format(vba!day(vba!now()),"00") + "/" + vba!format(vba!month(vba!now()),"00") + "/" + vba!format(vba!year(vba!now())-2,"0000"))

AND

CDate([DIM CALENDRIER].[ANNEE SCOL - MOIS - JOUR].Properties( "CAL - Date" ))<= CDate(vba!format(vba!day(vba!now()),"00") + "/" + vba!format(vba!month(vba!now()),"00") + "/" + vba!format(vba!year(vba!now()),"0000"))

)) ON COLUMNS


FROM [TDB MENSUEL])