signature or decryption was invalid

I am getting this when signing my soap elements:
Thu Feb 17 18:33:33 PST 2011:ERROR:org.apache.ws.security.WSSecurityException: The signature or decryption was invalid
at org.apache.ws.security.processor.SignatureProcessor.verifyXMLSignature(SignatureProcessor.java:529)

Is there a way to see exactly what it doesn't like? i.e. are the digests wrong, or is the signaturevalue wrong, or something wrong with the binarysecuritytoken?

if if could get some insight into what exactly it doesn't like, that would be very helpful.

thanks.