xcompmgr - No render extension | vnc client

[Rhyknowscerious]

Introduction
While on a VNC client connected to Arch Linux running FluxBox, I try to rum xcompmgr from a terminal and see this:
$this->bbcode_second_pass_code('', '
[user@host directory]$ xcompmgr
No render extension
[user@host directory]$
')
This is not a problem when I'm directly physically logged on to the server.

Main Problem
Does anybody know what a render extension is and how to get this to work?

Other Information
I'm running a Raspberry Pi with Arch Linux ARM installed on a 2Gb micro-SD card. I'm trying to get pseudo-transparency to work on this very small system.

I'm guessing something is fishy between the VNC client and xcompmgr but have no idea where to start. I looked at the xinitrc, VNC, and xcompmgr pages on the Arch Wiki and their man pages and had no luck. I've even done some searching on google and in forums. I'm completely stumped!

[sdjf]

Two thoughts. first, do you have Xrender installed? I wonder if the error message is referring to Xrender.

Second, maybe you could try starting your app with strace to see what the exact system calls are, there might be more clues. You can specify maxiumum string length per diagnostic line with -s NNN.

strace -s 200 -o OUTPUTFILENAME xcompmgr &

any arguments for your app can also be there as part of the command.