First of all remove the listenport configuration from the xsengine.ini configuration. It is no longer needed in SP6 and I've seen it cause just this problem.
The only other issue I see is that your server is a very recent build from Orange (SAP internal), but your Studio is not from Orange and build from the beginning of August. If your server is from Orange, then your Studio really should be as well. You might have a mismatch between the debugger APIs on the client/server side since you hitting a server which uses the internal sap-only Orange build.