CRM Web UI error- service cannot be reached

Hello Experts,

I have built a new system using system copy of CRM 7.0 and upgraded the same to CRM 7 Ehp3.

Initially, the WEB_UI tcode was not working. I once added parameters in RZ10 for web ui, i am able to login through web.

Problem now is, after logging in, we have a set of business roles to choose from.

After selecting a business role, we get a service not found message(screenshot attached).

Same thing happens for all the roles.

Kindly help.

Regards,

Mamta.