LOGON Failed :Logon performed in system ERP. No logon data provided.

Hi Gurus,

Please help me on this issue.I am clueless on where i went wrong.

I started newly in SAP GW,I created a demo project and generated a URI. However when i try the URI in a browser,then I am prompted for credentials.

However,I see that the URI generated by my senior team members DIDN'T ask for  credentials?

When I cancel the prompt ,I get following error

Logon performed in system ERP. No logon data provided.

Please throw some light on this.

Thanks much in advance

Lakshmi