Enterprise Manager is not working http://localhost:7001/em

Case1

After installing and Creating domain for SOA server I was getting some problem while running my enterprise manager. the error was

"Error 404--Not Found
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent."

There are many solution related to this problem on web but unfortunately I could not find any solution for me.  however may be my solution wont work for many of you but I hope this will help for many others.

In my case there was no em.ear file present under C:\Oracle\Middleware\user_projects\applications\base_domain

It means that while creating Weblogic domain I did not selected Enterprise manager. I solved this issue by extending my existing domain and then selecting Enterprise manger. Now If you run your enterprise manager it will run fine 

Case 2

If you are stilling facing the same problem then try this second solution this may help you. Change the deployment orders of different installed services on Weblogic console. To do this go to your weblogic console, then go to deployments now look at the EM is it running? or its status ok? No then note down its deployment order, now give it a unique deployment order from other applications. Every deployment should have unique deployment order otherwise it will cause problems.

After changing the deployment number to some unique number restart your admin server. Try to access EM now..