This was due the following:
1- AjaxPanel on master page is saved in the Collection IAjaxSubmitte in the master only.
2. when Rendering the Panel is not found as it was looked for in the Content while it is in the master.
3. on the client side the script was unable to identify the name of the panel to be refreshed with incomming html. so the script is reloading the whole page
the fix for this :
checking both Master and Content page for the IAjsxSubmitter collection.
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This was due the following:
1- AjaxPanel on master page is saved in the Collection IAjaxSubmitte in the master only.
2. when Rendering the Panel is not found as it was looked for in the Content while it is in the master.
3. on the client side the script was unable to identify the name of the panel to be refreshed with incomming html. so the script is reloading the whole page
the fix for this :
checking both Master and Content page for the IAjsxSubmitter collection.