would you be so kind and email me scAgent/logs/agent.log? I think that would be helpful to further lock down the issue.
If you could do a quick check, do the folders (in the scAgent) plugins/wrapper/in and plugins/wrapper/out exist? The file plugins/wrapper/wrapper should have execute permission. There was one similar know issue, which has been fixed. Unfortunately, I cannot tell you exactly, when the fix will be available.