Praveen,
Web UI is centric to SAP CRM only. You cant use it in ECC. Please do some research on this.
You need to use Webdynpro for your requirement.
http://help.sap.com/saphelp_nw04s/helpdata/en/77/3545415ea6f523e10000000a155106/frameset.htm
Regards,
Devashish