Channelstrip not available

Hi, when I want to open the channel strip plugin within an audio trck in Cubase 5 i get this message:

[ Not Available ]

I get this message eacht time i want to insert a MR effect in a Cubase Audio-track. What’s wrong?

Also, when i start up Cubase with the MR-Editor open, it says the IEEE1993 (?) something already is in use by another apppliciatione (i guess this would be cubase. Is this normal?