error message "Operation failed' when try to login

[popk6]

hi

i have error message when try to login.
i type username/password already, after that i have this error.

This is an error message:
----------------------------
The operation you were performing failed. You can retry the operation with or without changing its parameters. You may also want to report this problem to our support so that we could help you as soon as possible.
----------------------------

and other detail:

Unable initialize admin session:
---------------------- Debug Info -------------------------------
0: C:\Program Files\SWsoft\Plesk\admin\plib\cmd_loginup.php:237
createSessionCommon(integer '1', string 'admin', boolean true, boolean false, string '', NULL null, boolean false)
1: C:\Program Files\SWsoft\Plesk\admin\plib\cmd_loginup.php:357
createSessionAdmin(string 'admin', string '******', boolean false, string '', boolean false, boolean true)
2: C:\Program Files\SWsoft\Plesk\admin\plib\cmd_loginup.php:125
createSession(string 'admin', string '******')
3: C:\Program Files\SWsoft\Plesk\admin\htdocs\login_up.php3:23
-----------------------------

How can i do?
Thanks.

 

[JackL]

Switch Plesk to MySQL , it look that national settings affecting queries

John S.G.