Please ckeck your Folder and file permissions, check your web.config file, and be sure your Maschine Key are still the correct one (check with a older copy).  Be sure you connect succesfully to your Database (check both Connection strings on web.config). 

If you use a custom Skin check if the ascx controls still are the original of your Skin.  Be sure your site is not hacked. 

I suggest to upgrade your dnn instance after you found your issue with the Login about security reasens!

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Regards

Matthias

DNN MVP

www.aarsys.de

Metro7 Skin

ShoutCastStats Module for DNN

hi Sebastian, yes i cleared all information in browsers and test in differents pc and always the same problem

Matthias the db is connected succesfully, and i have a custom skin i´m checking for a backup of the DNN folder to compare the files but to now all looks same

The link of login page has a direction of __doPostBack('dnn$dnnLOGIN$cmdLogin','') when i click there open the main page

Is some way of make a second login page by code and late upload to some folder and can get access?

Thanks