Sys.WebForms.PageRequestManagerTimeoutException:The Server request tiemd out

Sys.WebForms.PageRequestManagerTimeoutException:The Server request tiemd out.点击右边红色标题查看本

Sys.WebForms.PageRequestManagerTimeoutException:The Server request tiemd out.
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页面出现提示框Sys.WebForms.PageRequestManagerTimeoutException:The Server request tiemd out.

请问怎么解决?

------解决方法--------------------
try:
<asp:ScriptManager ID= "ScriptManager1 " AsyncPostBackTimeOut= "36000 " runat= "server " />