SOAP calls fail for Message Size greater than 4096 (SoapUI 5.5)

Hi Folks!

 

I'm having a very strange error in SoapUI 5.5. Any Soap service requests I send out that have a Message Size greater than 4096 characters is failing, with the response:

HTTP Status 401 - No client certificate chain in this request

This error is not occuring when the message size is reduced, and it is not occuring for my coworkers who are using SoapUI 5.4 (so I don' t think it's a server config issue).

Any ideas?

 

Thanks,

Matt K