We are running Project Server 2010 and SharePoint 2010. I have a page created in the PWA site collection that has 6 different pageviewer webparts. The URLs in the webparts point to a server to different locations site that do not require authentication. I can put the url in any standalone browser (internal network) and it works every single time. However, when I run the URLs in the page within the webpart I get an intermittent 403 error (see pic below). It does not happen every time. I can refresh the screen and I may get it two or three more times than it will display. It also happens to be different webpart displays; can move around. Does anyone know of what is causing this? Something the execs want to see but I cannot turn it over to them because of the intermittent failures.
Cletus51