i've had a try via fiddler and can see that when you log in a cookie is created (.ASPXAUTH) - however the forms auth cookie in dotnetnuke is typically called  .DOTNETNUKE- please check your web.config and see if the following is there
 
forms name=".DOTNETNUKE"

if it is then that's your problem i.e. the application is stored the forms auth details in one cookie (.ASPXAUTH) but trying to read from another (.DOTNETNUKE) - im not sure how this might happen but .ASPXAUTH is the default for asp.net sites so i can think of a few possibilitie:

1. someone changed the machine.config to force the forms auth cookie to that name and not allow overrides
2. this website is in a virtual directoy/application and is inheriting a root websites settings (this makes no sense to me - the inheritance would work but would change it in both the set and get, and not just one)
3. the application pool is corrupted -this seems a bit unlikely to be so specific, but it might be worth recyling the application pool

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Thanx for your help but
i change it to .ASPXAUTH but still i cant login!!
any else solution? that's little confused

trying your credentials, I do get user name shown, but user link is directing to registration - which might be caused by missing permissions or sth like this. One reason might be too many roles assigned to the user - in this case, the userroles cookie cannot hold all role names (stupidly, names are stored instead of IDs). You may abbreviate role names and unassign your user from a couple of it (e.g.deleting rows in the database, table userroles)

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Cheers from Germany,
Sebastian Leupold

   

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