debugging web client

I used the soap wizard to create a web client based on the wsdl.  I was able to get a valid response back, and now it looks like the error is in decrypting the soap message response "inbound"

ERROR #6284: Security header error: SecurityTokenUnavailable.

%objlasterror =  error: 0 ìŒSecurityTokenUnavailableÃCPR¹.e^zImportHeader+62^%SOAP.Security.Header.1^1(e^zProcessHeaders+48^%SOAP.WebBase.1^1-e^zProcessSOAPEnvelope+18^%SOAP.WebBase.1^10e^zSOAPRequestResponse+123^%SOAP.WebClient.1^1)e^zInvokeClient+112^%SOAP.WebClient.1^1Dd^zInvoke+2^qcpr.registration.ws.HCValidationPort.one.validate.1^1=e^zvalidate+1^ws.HCValidationPort.one.1^1.e^zTest+40^api.Ontario.1^1&d^zDebugStub+30^%Debugger.System.1^2d^^^0

Primary question:  What element is the referring to in the soap document?

Other questions:

1.  How can I debug into the system classes?  I've been encountering the Soap.1 does not exist in the system.

2. Any other way to decrypt the message?  

3.  Other debugging tips?