CalenderExtender Language changing on postback

Hi ,

On the server only because on my development computer it is okay, on postback, my CalendarExtender language changes event if I put EnableScriptGlobalization="true" in the ToolkitScriptManager tag. The CalendarExtender is inside an Update Panel tag.

My web tools is available in en-US and fr-CA.

On my masterPage I have:

<asp:ToolkitScriptManager ID="toolkitScriptMaster" runat="server" EnableCdn="true"
        EnablePageMethods="true" EnablePartialRendering="true" EnableScriptGlobalization="true">
    </asp:ToolkitScriptManager>

Any Idea ?

Thanks!