c# - issue with Telerik_Web_UI_WebResource_axd -


when run website, following error message

cannot add duplicate collection entry of type 'add' unique key attribute 'name' set 'telerik_web_ui_webresource_axd'

here contents of web.config...

    <httphandlers>       <add path="telerik.web.ui.webresource.axd" type="telerik.web.ui.webresource" verb="*" validate="false"/>     </httphandlers>     <system.webserver>     <modules runallmanagedmodulesforallrequests="true"/>     <validation validateintegratedmodeconfiguration="false"/>     <handlers>       <add name="telerik_web_ui_webresource_axd" verb="*" precondition="integratedmode" path="telerik.web.ui.webresource.axd" type="telerik.web.ui.webresource"/>     </handlers>   </system.webserver>

if comment out handlers entry.. following error message...

'~/telerik.web.ui.webresource.axd' missing in web.config. radscriptmanager requires httphandler registration in web.config. please, use control smart tag add handler automatically, or see more information: controls > radscriptmanager

i total @ loss on how fix this. not know how use smart tag. have googled, looked so, looked telerik site , can not find solution where. not know if problem in web.config, virtual directory or where??? colleagues have same code base , web.config , works them.

edit here development machine setup...

windows 7 enterprise service pack 1 64 bit os

visual studio 2010 enterprise service pack 1 iis version 7.5

please help.

the problem wont in iis config; error message refers web.config file, that's going in .net

what happens if comment out httphandlers entry rather handlers ?

edit: after looking @ web.config file, thing can suggest changing format of system.webserver.handlers.add part from

<add name="telerik_web_ui_webresource_axd" verb="*" precondition="integratedmode" path="telerik.web.ui.webresource.axd" type="telerik.web.ui.webresource"/>

to:

<add name="telerik.web.ui.webresource"  path="telerik.web.ui.webresource.axd" verb="*" type="telerik.web.ui.webresource, telerik.web.ui" />

and that's because that's telerik suggest best practice; if doesn't work i'm sorry i'm out of ideas tonight, please leave question open, perhaps better idea see in morning.


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