running your app on a fresh install of Windows XP SP3 x86, with the following installed: # Visual C++ 2008 SP1 Redistributable Package (x86) # Windows Script 5.7 (part of SP3, verified) # Internet Explorer 6 and IE7 both tested # Internet Connection # dotnet 1.1, 2.0, 3.0, 3.5 When I run the app I get an HTA error: "Internet Explorer Script Error" "An error has occurred in the script on this page. Line: 3177 Char: 2 Error: invalid syntax Code: 0 URL: file:///C:/FireFoxCustom/Firefox.hta Do you want to continue running scripts on this page?"