problem with call java class "Failed to create Java class"

[William]

I have a problem when calling the java class have the following
message "Failed to create Java class."
as I solve this problem???? thanks for you help
the code example is

li_return = l_EJBConnection.createJavaInstance( l_javapbtest,
"pbjavajavapbtest" )
CHOOSE CASE li_return
CASE -1
MessageBox( "Can’t Create Java Class", "Failed to create
Java class.")
CASE -2
MessageBox( "Can’t Create Java Class", " Invalid proxy
name.")
CASE -3
MessageBox( "Can’t Create Java Class", "Failed to create
proxy object.")
CASE 0