issues using X-Forwarded-For Log Filter for Windows Servers

I've encountered some problems trying to use X-Forwarded-For Log Filter for Windows Servers. I've downloaded binaries (x86 version) and followed to installation manual from http://devcentral.f5.com/weblogs/Joe/archive/2009/08/19/x_forwarded_for_log_filter_for_windows_servers.aspx, but when I try to open a web-page on my site I get an error:

HTTP Error 500.0 - Internal Server Error
Calling GetProcAddress on ISAPI filter "C:\ISAPI Filters\F5XFFHttpModule\F5XFFHttpModule.dll" failed
Module IIS Web Core
Notification Unknown
Handler StaticFile
Error Code 0x8007007f

System Info:

OS - Windows Server 2008 Datacenter, 32-bit
IIS - 7.0
.NET Framework Version - 4.0
ISAPI Extensions & ISAPI Filters installed ok.

Filter is added to ISAPI and CGI Restrictions and to ISAPI filters for web-application too. IIS user (UISR) has read and execute access permissions for F5XFFHttpModule.dll. Web-application application pool works on .NET Framework 4 in Integrated mode, Process Model Identity - NetworkService(changing Process Model to ApplicationPool doesn't help). Debug version doesn't create any log file:(

What I see in windows event log:

The HTTP Filter DLL C:\ISAPI Filters\F5XFFHttpModule\F5XFFHttpModule.dll failed to load. The data ithe error.
Could not load all ISAPI filters for site '%sitename%'. Therefore site startup aborted.

However the filter works fine in Windows7 x64 + IIS7.5. An error described here is fixed by setting "Enable 32-bit Application" to true in web-application application pool settings. Be so kind to help me to puzzle out this trouble please.

Sorry for my English :)

Ok, I have figured it out.

I use downloaded HTTP module as ISAPI filter, i.e without installing it in IIS - it's my error Now I run install.ps1 script from HTTP module distrib(http://devcentral.f5.com/weblogs/Joe/archive/2009/12/23/x-forwarded-for-http-module-for-iis7-source-included.aspx), and all work fine!

thanks to Joe Pruitt for help!