Shibd not varifying signature...

Tue Aug 14 06:14:38 EDT 2012

HI ,

  I am getting the following error from shibd:

2012-08-14 15:38:55 ERROR OpenSAML.SecurityPolicyRule.XMLSigning [10]:
unable to verify message signature with supplied trust engine
2012-08-14 15:38:55 WARN Shibboleth.SSO.SAML2 [10]: detected a problem
with assertion: Message was signed, but signature could not be
verified.

 I only get this error when trying to use the ECP profile with delegation.
 when using basic SAML2 profile (REDIRECT) it seems to be ok...

 any ideas ?