As the error in the server log suggests (above), the last problem was caused by not allowing 'SSLInsecureRenegotiation'. Adding 'SSLInsecureRenegotiation on' to httpd.conf 'solved' the issue. SoapUI is now able to connect properly using the client certifcate.
So, in order to get it working i needed to:
1. Make sure the whole certificate chain was in my PFX file
2. Allow SSLInsecureRenegotiation on the server (htttpd.conf file)
3. Allow allowUnsafeRenegotiation on SoapUI (.vmoptions file)
Hope this helps somebody, i spent quite some time on this. ;-)
Futhermore, i really would like to switch back to the secure renegotiation. So if somebody got this to work properly, i would appreciate a quick tip ;-)
