Has anyone had this problem before? I have a Silverlight 2 application running fine, fully upgraded to Silverlight 3 and now from behind a proxy server all my WCF requests are getting 407 errors, the old Silverlight 2 site still work fine.
The client is pretty sure their proxy is using AD to authenticate access to the internet and my application is using forms authentication to allow access to the asp.net page hosting the XAP and the service has this attribute: [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] My guess is it's something with the new network stack in Silverlight3 and authentication but I'm not finding much info and can't replicate the environment from here. Hoping someone here has seen this before. John.
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