URL Alias not working

Hi,

We have performed the URL Alias setting based on the configuration mention inthe link http://help.sap.com/saphelp_nw70ehp2/helpdata/en/48/1d5d0171364269e10000000a421937/frameset.htm.

But it is still not working. Getting error 404 Not Found

Requirement is to have link:

http://<hostname>:<port>/irj/myalias

Regards

Arun