Most likely causes for not being able to login are if cookies are blocked in some way. For example sometimes cheap or free hosting puts your site inside a frameset or frame and no cookie can be set if the out frame has a different domain than the inner one. Other possible things to block a cookie are any kind of privacy guard software and sometimes even things like google toolbar can interfere.

Something is weird in your host because I just visited your site and it ran all the db setup scripts again when I visited it and now it shows the error page.

To find out what the error is you need to look in /Data/currentlog.config file or in Web.config enable it to show errors by setting:

<customErrors mode="Off" defaultRedirect="Error.htm" />

Hope it helps,

Joe

Don't paste in your whole log, just get the last few errors from the bottom and paste that. Click the clipboard icon with a T in the toolbar to paste as plain text.

I would look in the mp_Users table and confirm that the admin user was created and has the password admin. If not I would try deleting all the tables from the db (and stored procs if using MS SQL) and then try /Setup/Default.aspx again and see if it creates the suer this time.

Hope it helps,

Joe