How to use MarketingExpressionEvaluator.Evaluate ?

Hi,



I needed a way to use commerce server objects to evaluate expressions. I 
want use ExpressionEvaluator object to evaluate target expressions and 
catalog expressions, but couldn't find the way to evaluate this
expressions. 
I want the evaulation's result to be assigned to 
ExpressionEvaluator.ExpressionResult object. But I don't set to 
TarrgetingProfileCollection of the ExpressionResults' parameters. For this

reason ExpressionResult returns the "UndefinedResult" value, but the 
expected values are "true" or "false".



Below i have upplied the code that i expect to return boolean value, but
it 
returns "UndefinedResult"



UserObjectProfile profile = CurrentUser.GetUserProfile(true);

Microsoft.CommerceServer.Runtime.Profiles.Profile userprofile =

CommerceContext.Current.ProfileSystem.GetProfile("{" +
profile.Id.ToString() 
+ "}", "UserObject");

TargetingProfileCollection profiles = new TargetingProfileCollection();

profiles.Add("Profile",userprofile);



MarketingExpressionEvaluator expressionEvaluator = new 
MarketingExpressionEvaluator(connectionString, 
CommerceContext.Current.DebugContext);

MarketingExpressionEvaluator.ExpressionResult result = 
expressionEvaluator.Evaluate(expressinid, profiles);