Silk-RTM.exe installation module does nothing


I cannot install the silk project; when I run Silk-RTM.exe that I got from the project download page, and click Yes to accept terms, it shows a quick progress bar, then ends with a message box entitled 'patterns & practices Project Silk' with a message to refer to Readme.mht for information. That is it. It never asks me where I want to install the project, and the folder that the .exe is in is not changed. I am running Windows 7 Enterprise Service Pack 1.