Hi,
You can follow the procedure in the following article to change the service's port
Customizing and Securing the Remote Service
http://technet.microsoft.com/en-us/library/dd569093(WS.10).aspx
In this way , we can isolate this issue. Please also check the event viewer to see the reason why IIS cannot start.
In addition, I'd suggest you that uninstall We deployment tool, then reinstall it by using We Platform Installer.
http://www.microsoft.com/web/downloads/platform.aspx
Thanks.