How to set up wp multisite?

If you have your network sites allowed to install in subdomain like abc.hgd.com then you need to setup the Wild card DNS setting.

I think that could be creating the problem for you and redirecting you to the 404 error page.

Can you please let me know thw steps you followed to setup your multisite network?

It will help me to diagnose and get you a solution for this.

And for reference in installing an multisite network you can check this tutorial:http://www.youtube.com/watch?v=GwGC-_KH0jY&list=TL-0rX5lBuOXgsDct31TCGFvM8PebAUUeD

http://wpmu.org/wordpress-multisite-guide/

Let me know if it resolves your problem.

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