Dashbord not working after windows administrator password changed

SOLVED

Hi

our dashboard wouldn't open because we changed our windows administrator password.

when we open dashboard http://beg-can-mass/BusinessInsightsDashboard/, we get the following error.

how to fix this, can we reset data source authentication or we need reinstall dashboard? 

 

Thanks

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information:

Module    IIS Web Core
Notification    BeginRequest
Handler    Not yet determined
Error Code    0x8007052e
Config Error    Can not log on locally to C:\inetpub\wwwroot\BusinessInsightsDashboard as user beghellicanada\administrator with virtual directory password
Config File    \\?\C:\inetpub\temp\apppools\.NET v4.5\.NET v4.5.config
Requested URL    beg-can-mass:80/.../
Physical Path    C:\inetpub\wwwroot\BusinessInsightsDashboard\
Logon Method    Not yet determined
Logon User    Not yet determined

Config Source:

   96:         <application path="/BusinessInsightsDashboard" applicationPool=".NET v4.5">
   97:           <virtualDirectory path="/" physicalPath="C:\inetpub\wwwroot\BusinessInsightsDashboard" userName="beghellicanada\administrator" password="[enc:AesProvider:TjnIovoVo0OzFj5dRJR0nHkv4HG834rQC/RHOeEckDQ=:enc]" />
   98:         </application>