testing one way service from soapui

hi
i am testing one way service from SOAPUI, when i am submitting valid message it gets submitted properly but when i submitted invalid message it is also getting submitted but it is not showing any error message like the message is invalid.

i am sendiing message to https://servername/...

when i am testing same scenario with the http endpoint it is providing me the error message but now it is not.

can you please help me with this why it is not working as expected?

regards,
Amit