How to Fix error ls2j : threw java.lang class not found exception in lotus script?

Question

here is my code

Dim jSession As JAVASESSION
Dim jClass As JAVACLASS
Dim jObject As JavaObject

Set jSession = New JAVASESSION()
Set jClass = jSession.Getclass("JavaAgentReporter")

Set jObject = jClass.CreateObject
Call jObject.myMethod()     

and I am invoking this onClick of ana action button