ALSB 3.0 : Request message works in Test Console but not from Client side

Question

By invoking a Web Service operation through a signature/encryption enabled Proxy Service in the ALSB Test Console for Proxy Services, i get a successful response.
Now when invoking the operation from a client application i get the following error response:
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Header/>
<env:Body>
<env:Fault xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
<faultcode>wsse:FailedCheck</faultcode>
<faultstring>weblogic.xml.crypto.encrypt.api.XMLEncryptionException: Unable to resolve encryption key for weblogic.xml.crypto.encrypt.api.EncryptedType{keyInfo=null, cipherData=CipherValue: zDeM4MKI8OeFzgJAR+z16ZE3cUfw54DtMKojPNACkVVZM0hazes+DcI4rJIHWzgt5N259pi9WTKgSEgBxQLZ3qD6PycrwTZuQ/4g2JbBwLwbO9WS40NsIhZRQCtguFPG8vKwNWeoXMOZ5w0m3jhV2ahFWZCTAipoG4XIOv/7pEw=, id='Enc-6abda982-1678-4774-97f3-cada98d32869', mimeType='null', encoding='null', encryptionMethod=EncryptionMethod: algorithm = http://www.w3.org/2001/04/xmlenc#aes256-cbc;}</faultstring>
</env:Fault>
</env:Body>
</env:Envelope>
Even when pasting the original request from the Test Console in ALSB into "soapUI" and executing the request it does not work:
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Header/>
<env:Body>
<env:Fault xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
<faultcode>wsse:InvalidSecurity</faultcode>
<faultstring>Could not validate encryption against any of the supported token types</faultstring>
</env:Fault>
</env:Body>
</env:Envelope>
So what's behind all this? Why does it work in the test console but never from other points.

Answer 1

In both ways, with Direct Call option selected or deselected, the behaviour is the same.
I cannot explain, why the replay of the request does not work from outside the Service Bus. Is there some sort of unique data mixed into the CipherValue data or something like that?