Old story same issues with the KBO soap framework.Keep getting the same message as you guys " [ns1:SecurityError] A security error was encountered when verifying the message " , tried all the workarounds provided here. The funny thing is that in SoapUI it works!!!! Comparing the 2 request XML messages (SOAPUI vs PHP code) the only things that differs fundamentally is the length of the digested password & NONCE (longer with the PHP generated XML). So it may be that we are talking a bout a wrong encoding of the pass digest and NONCE on the PHP side? Have you got any kind of success in accessing the KBO WS in the end? Thanks