Those plugins you copied from the Shared Plugins folder are DX plugins and copying them is not sufficient. they need to be regfistered and so they have a proper installer. Not like VST's where you can copy .dll files around the place. You can do a couple fo things one ioncludes a registry edit the other requires that you access the regserv32.dll (or 64 bit equivalent) to register the appropriate files in the registry.
You haven't mentioned which plugins specifiaclly or things like which operating system and whether its 32 or 64 bit.
there are some of the cakewalk FX spoecifically the Soundstage FX from the FX pack 3 that won't install in 64 bit X1 or 8.5 for that matter as its strictly a 32 bit DX plugin.
anyway - give us a bit more info as requested.
if you have a corrupt registry file causing the problem, constantly repeating the installtion is of no value. Also uninstalling SONAR without deleting the corrupt keys is also of no value as the keys are not corrected during the next installation.