Value Help in search criteria in CRM WEB UI

Hi All,

I am having 5 fields coming as dropdown in search criteria of Account in WEB UI.

Now when I am selecting field1, a f4 help needs to be assigned againest that field so that user can search values.

I have implemented the GET_V method of that particular field & passed the Outbound plug. But it is not working.

Now instead of the search view,I have done the same thing in Details view for a field, the f4 help is coming.

Is there any restriction for search view -