VUGen is not recording Jacada Server Applications.

Jacada Server V7.x
Load Runner V 7.51
Windows NT

I am trying to test Jacada Server and VUGen is not recording the script.
JDK 1.4.2 LR 7.51
Checked the class path and entry was there. I selected vendor class of Local and network, both ways its not recording. I changed additional classpath in JavaVM also.
Where am i making mistake?
Error I am getting is:
Warning: Classpath entry not found: c:\program files\mercury interactive\winrunner\classes;c:\progra~1\segue\si lktest\javaex\silktest_java1.jar;

Any one has any clue?