Don't use FieldDeinterlace - try with AssumeTFF().Telecide(), the material could be field shifted which will be fixed by Telecide. If that doesn't fix it, you probably need to use Restore24 to get the original progressive frames back.
You need the correct Repair dll.
http://home.pages.at/kassandro/Remov...emoveGrain.zip (official)
I don't remember the URL for the unofficial release but you might find it by using removegrain.rar as the search term.
Extract the correct dll file to your plugins folder, the one you need depends on your CPU, that is, what instruction sets it can use.