Tried to install on RedHat Workstation - 5.3

Got this error on startup:
Couldn't access Yahoo! Zimbra Desktop server.


From Log:

2009-10-14 18:06:40,563 INFO [main] [] log - Opened /home/steven/zimbra/jetty/logs/access_log.2009-10-14
2009-10-14 18:06:40,644 WARN [service-port-ping] [] offline - service port check failed; will retry in 5 seconds
com.zimbra.common.soap.SoapParseException: cannot determine soap protocol in reply: <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/><title>Error 404 NOT_FOUND</title></head><body><h2>HTTP ERROR: 404</h2><pre>NOT_FOUND</pre><p>RequestURI=/service/admin/soap/</p></body></html>
at com.zimbra.common.soap.SoapTransport.extractBodyEl ement(SoapTransport.java:249)
at com.zimbra.common.soap.SoapTransport.parseSoapResp onse(SoapTransport.java:227)
at com.zimbra.common.soap.SoapHttpTransport.invoke(So apHttpTransport.java:295)
at com.zimbra.common.soap.SoapHttpTransport.invoke(So apHttpTransport.java:230)
at com.zimbra.common.soap.SoapTransport.invoke(SoapTr ansport.java:318)
at com.zimbra.common.soap.SoapTransport.invokeWithout Session(SoapTransport.java:305)
at com.zimbra.cs.offline.OfflineSyncManager.confirmSe rviceOpen(OfflineSyncManager.java:586)
at com.zimbra.cs.offline.OfflineSyncManager.access$30 0(OfflineSyncManager.java:53)
at com.zimbra.cs.offline.OfflineSyncManager$1.run(Off lineSyncManager.java:561)
at java.lang.Thread.run(Unknown Source)
2009-10-14 18:06:40,645 INFO [main] [] log - Started SelectChannelConnector@127.0.0.1:7633
2009-10-14 18:06:45,812 INFO [service-port-ping] [] offline - service port is ready.