Compression Support not configured ?

[Neils]

Hi,
 
I want to use compression-support of Lucene. I'm using Lucene 2.0.0.4 and
DotNet 2.0.
 
Compression is done like this: 

Dim TermManufacture As New Field("Manufacture", Manufacture,
Field.Store.COMPRESS, Field.Index.TOKENIZED)

By trying this i got the errormsg "Compression Support not configured".

How do I enable compression-support?

Thanks :-)