iis 7 - Troubleshooting 404 WCF Service error -

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i've upgraded asp.net application .net framework 3.5 4.0. application includes wcf service , after upgrade it's returning 404 error.

the error message below:

server error in '/' application. --------------------------------------------------------------------------------  resource cannot found.  description: http 404. resource looking (or 1 of dependencies) have been removed, had name changed, or temporarily unavailable.  please review following url , make sure spelled correctly.   requested url: /ws/providerservice.svc   -------------------------------------------------------------------------------- version information: microsoft .net framework version:2.0.50727.42; asp.net version:2.0.50727.42

the web.config has

<error statuscode="404" redirect="common/pages/404b.htm"/>

and should redirecting 404's custom page. if try access non existent .asmx service correctly redirects 404b.htm page.

it looks .net framework 4.0 isn't handling somehow being picked .net framework 2.0.

the site on iis7 , windows server 2008.

any ideas?

even .net 4.0, believe asp.net says net framework 2.0, setting customerror tag in web.config

make sure set "off" not "remoteonly"


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