I upgrade my site from DNN 4.84 to DNN 4.9  ,the uprgrade process was done successfully,I logon successfully into my site as an admin account,then when i try to access any admin page (host setting,site setting,modules,skins.......) i got an error  page,I reinstall and configure the upgrade multiple time on a clena backup,but nothing ,same problem :

	Internet Explorer cannot display the webpage
	Most likely causes: You are not connected to the Internet. The website is encountering problems. There might be a typing error in the address.
	What you can try:
	Diagnose Connection Problems
	More information This problem can be caused by a variety of issues, including: Internet connectivity has been lost. The website is temporarily unavailable. The Domain Name Server (DNS) is not reachable. The Domain Name Server (DNS) does not have a listing for the website's domain. If this is an HTTPS (secure) address, click Tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section.   For offline users You can still view subscribed feeds and some recently viewed webpages. To view subscribed feeds Click the Favorites Center button , click Feeds, and then click the feed you want to view.   To view recently visited webpages (might not work on all pages) Click Tools , and then click Work Offline. Click the Favorites Center button , click History, and then click the page you want to view.

This is an issue with your SSL settings. If this is a single portal installation you'll need to make the changes in the database. If it is a multi-portal install and you can access the Host>Portals menu you can edit the portal settings from there.

In the Site Settings>Advanced Settings>SSL Settings remove the checkmark from the SSL Enabled and SSL Enforced check boxes.

I would help you with the DB info but for the life of me I can't find where the site settings are stored. The Tabs table has an IsSecure field but these are set to True for hthe sites that work. There must be a DB field someplace that you can change the SSL Enabled and SSL Enforced from true to false for a specific portal.

Anyone tell us where that is at?

I have one portal,I set the IsSecure to false in the table "tabs",,The problem is solved.

thanks for all