Can some-one pls help with this error message

I get this error message everytime i try and create a room for group chat. Im pretty new to this, so a nice and easy explanation is would be great. i did a basic installation on a fedora 8 system. I am also using the embedded HSQL Database Engine 1.8.0.

Exception:

java.lang.IllegalArgumentException: Illegal JID: sop@sales order processing.intranet.lidco
     at org.xmpp.packet.JID.init(JID.java:396)
     at org.xmpp.packet.JID.(JID.java:246)
     at org.jivesoftware.openfire.admin.muc_002droom_002dedit_002dform_jsp._jspService(muc_002droom_002dedit_002dform_jsp.java:90)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:66)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:42)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:70)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:146)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
     at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
     at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
     at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
     at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
     at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
     at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
     at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
     at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
     at org.mortbay.jetty.Server.handle(Server.java:324)
     at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
     at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
     at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
     at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
     at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
     at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
     at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: org.jivesoftware.stringprep.IDNAException: Contains non-LDH characters.
     at org.jivesoftware.stringprep.IDNA.toASCII(IDNA.java:106)
     at org.jivesoftware.stringprep.IDNA.toASCII(IDNA.java:46)
     at org.xmpp.packet.JID.init(JID.java:367)
     ... 33 more

Probably you are using some unsupported characters in the room’s name. What name do you try to use? What happens if you just create the room called “test”?

Try removing the spaces from the JID.