Input Help F4 in Interactive Adobe Form

Dear All,

I want to display search help in Adobe Form.

I have created Webdynpro Component in which I have used the PDF Source as well as created Form where I have used Value Help.In context also I have provided search help.But still I am not getting the F4 popup as SAP.But in another system same thing I have tried it is coming.Please provide any solution.

Regards,

Dillip Mishra