DirectShowSource and Windows Server 2008

[t2nolan]

Hello, I'm new to AviSynth... I've had success working with it on Windows 7, but when I try to use it with Windows Server 2008 SP2, I can't get DirectShowSource to load video files. I've installed Desktop Experience, but it didn't install x264... I've read there's a Windows Update to resolve this, but only for Windows 2008 R2. I've also tried installing many codec libraries, and have been using "DirectShow Detective" to see Microsoft MPEG4 encoders ever get installed, but they don't.

Here's what I've installed:
"Desktop Extensions" - which installed Media Player, codecs, and codec
Windows Essentials Media Codec Pack
K-Lite Codec Pack Full
VLC
QuickTime

I'm sure this is a common problem, how can I get around it? Are there other non Microsoft codecs I can install that DirectShow will automatically use, or do I need update something to make this happen?

AVS Script:
video0 = DirectShowSource("video0.avi", fps=30, pixel_type="RGB24")
video1 = DirectShowSource("video1.avi", fps=30, pixel_type="RGB24")
Dissolve(video0, video1, 30)

AVS Error:
avs [error]: `test.avs' didn't return a video clip

x264 test.avs -o test.mp4 --bframes 3 --ref 3 --vbv-maxrate 2500 --vbv-bufsize=25000 --level 40 --threads