[help]Which version of IDA pro can decomplie .NET app?

i think it is just a begginer's question. But When I load the exe into IDA Pro 4.5.0 (From this Forum FTP) , IDA can find it is a .NET exe , But it apear this error: Can not set the target processor type "cli" ...

So i check for the IDA support CPU list in 4.5, surely i can't find it.
Could someone do me a favour that tell me that which version of IDApro i should use in this ...

Thanks!