I try to download tube video to iPad, igot a response safari can not connect. Please help

.exe files are Microsoft Windows Executable files, that can only run on Microsoft Windows. They cannot be run on the iPad, so Safari doesn't download them.
The place to get apps for the iPad is the App Store - have a search, there'll probably be something that can do what you need. Out of interest, what are you trying to do? I may be able to suggest an app.
Hope that helped!

Microsoft Silverlight is a plugin that only works on some desktop browsers. It is never going to be supported in Safari, because it is rapidly becoming outdated - content providers should be using more modern, efficient and faster technologies. Depending on what you are trying to do, there may be a native way of doing it - search for it in the App Store.
You cannot download IE because Microsoft do not make IE for the iPad. You cannot run MS Windows programs (.exe files) on the iPad. If you don't want to use Safari to browse the web, just search 'browser' in the App Store, and you'll find soma alternatives.
Just remember: The App Store is the only place you can get apps for your iPad!
Hope that helped!