Hi,
Step 1: Verifying the configuration parameters for ICM.
Use Transaction SMICM (ICM Monitor).
Displays the ICM configuration and monitoring. Make sure it is running. Check the following ICM parameters.
[Menu-> Goto -> Parameters ->Display]
- icm/server_port_0 PROT=HTTP,PORT=8000
- icm/host_name_full <Full Qualified Domain Name>
I will use the domain name as testp1.bomain.cpstl
Following parameters should be checked. 
Step 2: Activate Required Services:
Following 3 services need to be enabled.
- /default_host/sap/bc/gui/sap/its/webgui
- /default_host/sap/public/bc/ur
- /default_host/sap/public/bc/its/mimes
Use Tcode‘SICF’ to enable services. Then execute it to show the services trees.
Then activate the mentioned services according to the below guide.
- /default_host/sap/bc/gui/sap/its/webgui
- /default_host/sap/public/bc/ur
- /default_host/sap/public/bc/its/mimes
Right click on the relevant service and then activate it. 
Step 3: Publishing Services:
Run T-Code SIAC_PUBLISH_ALL_INTERNAL to activate the services. Will take few minutes. While running it will show the status message like:
Finally the following screen can be seen.
STEP 4: Login In to the SAP GUI though Web
Type one of the following URLin the web browser
- http://<IP>:8000/sap/bc/gui/sap/its/webgui
- http://testp1.bomain.cpstl:8000/sap/bc/gui/sap/its/webgui
Then the login screen will come.
Then ask you to provide the username and password. Login an roam in to the SAP 
Refecence : SAPNOTE 517484
BR
Atul