How to create iView to run Web Service

Hi,
I need create iView on EP7 NW2004S SP12 portal to run Web Service provided on SRM 6.0 system.
Here is how I have attempted to create the iView:
1. Right click and select New =>iView.
2. Select "iView Template" radio button.
3. Select "Web Service iView" radio button to specify Web Service Template.
4. Enter name and ID of iView.
5. Select System Alias of System defined earlier.
At this point, the portal attempts to connect to the ECC system, and it fails with this error, and I cannot finish the create of the iView.
Could not connect to back-end application. Check your system. The server may be down or there may be an error in a system parameter.
Here are the key parameters defined for the System referenced by the system alias:
WSDL_URL:http://sap2.mycompany.com:50000/SRM-MDM/SRM_MDM
Logon Method:UIDPW
User Mapping Type:admin, user
CodeLink:com.sap.portal.systems.webservices.webservice_system
I've also created a usermapping for the Everyone group, and provided the userid and password for the system alias successfully.
Thanks,
Kevin

Thank you for that information. I had not previously seen a procedure on how to setup an iView to run a web service.
I had created the System just as described in this blog, but I still have a problem. When creating the iView (on the last step of process when I click Finish), the portal attempts to connect to the SRM system, and it fails with the error highlighted below.
Could not connect to back-end application. Check your system. The server may be down or there may be an error in a system parameter.
I get an error in System Administration as well when I test the connectivity for the System object.
Test Details:
The test consists of the following steps:
1. Retrieve the default alias of the system
2. Check the connection to the backend application using the connector defined in this system object
Results:
Retrieval of default alias successful
Connection failed. Make sure that Single Sign-On is configured correctly
How does the security need to be setup to make this work? Or what could be causing this error? I do have SSO configured between the portal and the target system.
Thanks,
Kevin

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