junit test teminated

when i doing a junit test,i told me it was terminated.and the information was :

java.lang.NoClassDefFoundError: Files\IBM\TeamConcert///////server/booksystem/repositoryDB
Caused by: java.lang.ClassNotFoundException: Files\IBM\TeamConcert.......server.booksystem.repositoryDB
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Exception in thread "main"

is there anyone who could help me?