VCO&VCD integration issue: Caches cannot be added by name when default cache config is not specified in the config

Hi experts,

I am doing some test to integrate VCO 5.5.1  with VCD 5.5.

VCO plugin version: vCloud Director 5.5.0.1546869

when add a VCD to VCO in " VCO client-> vCD->plugin config->Add connection",

configuration as below: 

session: share session,

Organization:system,

samel: no samel

user: administrator

I get error " login failed with user name administrator".

check log, find that:

[pool-16-thread-3] ERROR {user@abc.com:Add an organization:338080808080808080808080808080809580808001266312685778e677578588f:ff80808146660dff0146674c421e0107}

[ModelHelper] Error initializing host https://vcd server:443 (administrator@System). Host discarded!

com.vmware.vmo.plugin.vcloud.VCloudPluginException: Caches cannot be added by name when default cache config is not specified in the config. Please add a default cache config in the configuration.

        at com.vmware.vmo.plugin.vcloud.config.xml.VCloudHost.login(VCloudHost.java:346)

        at com.vmware.vmo.plugin.vcloud.model.ModelHelper$CloudHostLoginTask.call(ModelHelper.java:111)

        at java.util.concurrent.FutureTask.run(Unknown Source)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

        at java.lang.Thread.run(Unknown Source)

Caused by: net.sf.ehcache.CacheException: Caches cannot be added by name when default cache config is not specified in the config. Please add a default cache config in the configuration.

        at net.sf.ehcache.CacheManager.addCache(CacheManager.java:1175)

        at com.vmware.vmo.plugin.vcloud.VCloudCacheManager.getCache(VCloudCacheManager.java:67)

        at com.vmware.vmo.plugin.vcloud.VCloudAdaptor.login(VCloudAdaptor.java:324)

        at com.vmware.vmo.plugin.vcloud.config.xml.VCloudHost.login(VCloudHost.java:333)

        ... 5 more

Any suggestions.

thanks.

david