JigAdmin error

Hi, I get the following error starting JigAdmin - any ideas?
Thanks in advance,
Steve Doig

org.w3c.jigsaw.admin.RemoteAccessException: Unable to contact target server  127.0.0.1:80090 after 3 tries.
 at org.w3c.jigsaw.admin.AdminContext.runRwquest(AdminContext.java:122)
 at org.w3c.jigsaw.admin.AdminContext.loadBoot(AdminContext.java:141)
 at org.w3c.jigsaw.admin.AdminContext.getAdminResource(AdminContxt.java:166)
 at org.w3c.jigadmin.gui.ServerBrowser.initialize(ServerBrowser.java:294)
 at org.w3c.jigadmin.gui.ServerBrowser.<init>(ServerBrowser.java:212)
 at org.w3c.jigadmin.gui.ServerBrowser.main(ServerBrowser.java:542)
 at org.w3c.jigadmin.Main.main(Main.java:19)