getting error running Java app on server

I created this app using Eclipse 2.0 and it works great in Eclipse. I moved it to UNIX and I get an error.

Caused by: java.lang.UnsatisfiedLinkError: sun/print/Win32PrintServiceLookup.notifyFirstPrinterChange(Ljava/lang/String;)J

at sun.print.Win32PrintServiceLookup.access$000(Unknown Source)

at sun.print.Win32PrintServiceLookup$PrinterChangeListener.<init>(Unknown Source)

at sun.print.Win32PrintServiceLookup.<init>(Unknown Source)

The Eclipse was running JDK 1.6 and the server is running JDK 1.5, does this make a difference? Is this my problem?