I am attempting to follow an upgrade path from 4.8.4 to 6.2. I was able to get to 4.9.5 but now am stalled as I can't get to the next segment in the path, 5.4.4.

All I get is:
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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>
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Everytime. Have made all the changes to the web.config file. The upgrade wizard also doesn't start up. Am at a loss. Any help would be appreciated.

Thanks.