If you get the error
"Could not create SOAP Connector to connect to host localhost on port 8881" 
installing or updating portals it's probably to do with your credential vaul
t settings. The problem I ran into was that the values for deployment.keysto
re and deployment.truststor
e where set to a fully qualified path, it should be a relative path ie /etc/
DummyClientKeyFile. This path when built completely generally points to the 
AppServer/etc subdirectory.
What the message "Could not create SOAP Connector to connect to host localho
st at port 8881 with SOAP Connector security enabled." means is that it cann
ot find or use the credentials to connect over the sopa port.
You have to fully restart the Portal Server after doing this.
Hope this helps you, I worked with an IBM rep for hours fixing this.

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