Replay Media Catcher 3.0.1 with the old version of plugin_zrtmp.dll can perfectly record RMTPE streams from DirectSex:
Tutorial: How to record live video chat from DirectSex with Replay Media Catcher

As of January 28, 2009, any newly installed copy of Replay Media Catcher does not support Adobe Secure RTMP Measures.

Related thread:
RTMPE stream recording/downloading/capturing/ripping/saving