can't login SugarCRM

Does anyone know, please help me.

I have done instration successfully, but I can't login.

If access below URL directly, display「loading..」message, and can't login.
http://(ServerIP)/SugarCRM/

LoginPage.png

I checked these log files, but could not find error.
・install.log
・sugarrm.log
・eventvwr

environment

Windows 2008 R2 StdEdition
IIS 7.0
SugarCRM 7.6.1.0

Internet Explorer 11

thanks.