VST Effect not Appear in Cubase 5

Hello!
I would like to use DVS Space Echo but it does not appear in Cubase 5.

http://www.dreamvortex.co.uk/effects/

I put it in the folder “C:\Program Files (x86)\Common Files\Steinberg\VST2” does not appear in Cubase.
I put it in the folder “C:\Program Files (x86)\Steinberg\Cubase 5\VSTPlugins” does not appear in Cubase.

However, I put all my VSTi synths in the “C:\Program Files (x86)\Steinberg\Cubase 5\VSTPlugins” folder and they appear in cubase.

Where should I put the DLL? Thank you.