Basically, it says that you have checked the "Do not save username and password" check box , so a workaround is entering the OEM Configuration Assistant and uncheck it.
That was such a great help!!! I found out the problem.. I didn't even have the omsconfig.properties file!!!! As I'm new to oracle admin, learning one by one now only.. Now, have to figure out to get this..
If u have any ideas, could u please suggest.. Thanks..