How to Test SSO Setup in Netweaver 7.3 PORTAL

Hello Experts,

I have setup SSO between Portal and ABAP system.

EP2 is my SID.i have Added ABAP system as Trusted in --> http://<hostname>:port/SSO2

From what I was trying to test the configuration is from test and configuration tools.(system administration--> Support.)

(note : after adding abap System in Portal.) when I select the tool transaction from the drop down and have given the inputs 1.alias 2.Tcode 3.SAP GUI for HTML.

Then I get Below Error.when executed ...

please help me to correct this error.

and also let me know if there is another way to Test SSO configuration in Netweaver 7.3

Thanks

Indrajith.