How to avoid saving a work item if a custom work item attribute condition is not satisfied?

Hello,

I am using Rational Team Concert 5.0.2.

I am not able to configure an attribute condition which prevents from saving a work item if it is not held.

I have made the following customizations in my project area:

1) I have added a new attribute (with a name "Team") of the work item type "Task" in Project Configuration --> Configuration Data --> Work Items --> Types and Attributes

    Its type is "Category".

2) I have added a script based condition (named "VerifyTeam") in Project Configuration --> Configuration Data --> Work Items --> Attribute Customization:

2.1) Attachment Path: /workitem/scripts/common/verifyteam.js

2.2) Class Name: com.visteon.team.Condition

2.3) Script (if the attribute named "Team" does not contain the prefix "team_" then the script returns false):

dojo.provide("com.visteon.team.Condition");

dojo.require("com.ibm.team.workitem.attribute.category");
dojo.require("com.ibm.team.workitem.api.common.WorkItemAttributes");


(function() {

   var WorkItemAttributes= com.ibm.team.workitem.api.common.WorkItemAttributes;


    dojo.declare("com.visteon.team.Condition", null, {

        matches: function(workItem, configuration) {

            var team = workItem.getLabel("com.visteon.team.workitem.attribute.category");
            var position = team.indexOf("team_"); 
   
            if ( position === 0 ) {
                 return true;
            }
     
            return false;
        }
    });
})();

3) I have added a new precondition for the Work item operation "Work Items -->Save Work Item (server)" for the role "Everyone" in Team Configuration --> Operation Behavior:

    -- Attribute Validation

I'd expect that I am not able to save my work item of a type "Task"  if the value of the "Team" attribute does not start with the prefix "team_". Unfortunately no matter what is the value of this attribute I am able to save the work item.

As a comparison I added a similar validator by changing the script a little bit and it works.

Can you please help me find what I am doing wrong?

For information, the validator works only in the web client, but not in the Eclipse client. 

Thanks in advance for your help!

Regards,

Krasimir Malchev

Visteon Electronics Bulgaria