ERROR WHILE INSTALLING sql SERVER 20008 r2

SQL Server 2008 R2 - There are validation errors on this page. Click OK to close this dialog box. Review errors at the bottom of the setup page, then provide valid parameters or click Help for more information.
Note : this error comes on ServEr configuration tab  (while installation comes )

as i am using the admin user name and password from 
 "USE THE SAME ACCOUNT FOR ALL SQL SERVER SERVICES"

THE BROWSEING TO MY ADMIN ACCOUNT

THEN ALSO GETING SAME ERROR CAN U HELP