Pug in installation

[Parral_L]

I'm having the hardest time getting FL 12 to recognize these new VST's I've recently purchased. If anyone can help me I'd greatly appreciate it. The first 2 went along without a hitch. But now these others are just not being found in FL when I go to "Manage Plugins' I've changed the folders they were in and everything and can not get them installed. Thank you greatly in advance!