Google Webmaster not launching

I use GoDaddy Hosting and I want to access My webmaster options.
I have verified the site , but once I click [ Launch Google webmaster tools ]
It takes forever to load ( been trying this since last friday ) and When it does load , this comes up :

Server Error in ‘/’ Application.

Runtime Error

Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a “web.config” configuration file located in the root directory of the current web application. This <customErrors> tag should then have its “mode” attribute set to “Off”.

<!– Web.Config Configuration File –>

<configuration>
<system.web>
<customErrors mode=”Off”/>
</system.web>
</configuration>

Notes: The current error page you are seeing can be replaced by a custom error page by modifying the “defaultRedirect” attribute of the application’s <customErrors> configuration tag to point to a custom error page URL.

<!– Web.Config Configuration File –>

<configuration>
<system.web>
<customErrors mode=”RemoteOnly” defaultRedirect=”mycustompage.htm”/>
</system.web>
</configuration>

Any idea how I can fix this?