They worked on my other computer with the same software. But for some reason, when I installed everything to a new machine, it won't recognize my VSTis. What's going on?
You have not given us enough information - what is the difference between your old computer and the new apart from the spec are you using a different version of Windows.
If I had to guess - you are now on Windows 8 and have put the VST's into the wrong location or not included the path in the program settings.