Restore ProxyMapping default value

Dear All,

I could not restore default value back to EP proxy mapping of HTTP provider service.

Earlier I set mapping value as 50001=(Host:<webdispatcher host>,Port:80,Scheme:http,Override:false)

I want to turn it back now.

When I logon EP with port 50000 or with port 80 via web dispatcher,protocol changes to HTTPS.

Even though I restarted EP system after restoring default value or setting 50000=(Host:<webdispatcher

host>,Port:80,Scheme:http,Override:false),50001=(Host:<webdispatcher

host>,Port:443,Scheme:https,Override:false).

How would I revise it back to default?

Any other extra procedures?

Please help.

Thanks much.