Ha.  I started looking into how the authentication model was changed in 4.6.0, and found this piece of SQL in the upgrade script:

/* Update ControlSrc for SignIn ModuleControl */
/******************************************************/

UPDATE {databaseOwner}{objectQualifier}ModuleControls
    SET ControlSrc = 'Admin/Authentication/Login.ascx'
    WHERE ControlSrc = 'Admin/Security/Signin.ascx'
GO

If you don't read SQL, that moved all calls for Signin.ascx to Login.ascx.  If you look at the package you used to upgrade, it did not include admin/security/signin.ascx.  It's just not a part of DNN anymore.  See if using Login.ascx doesn't do for you what you are expecting.  Or just use ?ctl=login, rather than directly accessing the control (which, as we've seen, can change).

Hope it helps,

Make sure you changed the web.config file.

I had this same problem and put the machine code and other adjustments i made to the old web.config file into the release.config.  Backed up the web.config and renamed release.config to web.config and the problem disappeared right away.

Also - if I do a query:

select * from moduleControls
WHERE ControlSrc like '%login.ascx'

I get:

72    NULL    Login    SKIN    Admin/Authentication/Login.ascx    NULL    -1    NULL    NULL    0
88    NULL    LOGIN    SKIN    Admin/Skins/Login.ascx    NULL    -2    NULL    NULL    0
99    NULL    SIGNIN    SKIN    Admin/Authentication/Login.ascx    NULL    -2    NULL    NULL    0
71    74    NULL    SKIN    Admin/Authentication/Login.ascx    NULL    -1    NULL    NULL    0

Should ID 88 have been changed as well? Much appreciated!

Entrepreneur

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