[Haskell] WxHaskell

[Morkai]

Hi, I'm using GHC 6.4.1 and I've installed WxHaskell 0.9.4 from the 
batch file.
When trying to run the examples in interactive mode I get the following 
error:

***************
Loading package base-1.0 ... linking ... done.
Compiling Main             ( 
C:/Programmi/Tony/wxhaskell-0.9.4/samples/wxcore/He
lloWorld.hs, interpreted )

C:/Programmi/Tony/wxhaskell-0.9.4/samples/wxcore/HelloWorld.hs:6:0:
    Failed to load interface for `Graphics.UI.WXCore':
        Bad interface file: 
C:\Programmi\Tony\wxhaskell-0.9.4\lib\imports/Graphi
cs/UI/WXCore.hi
            mismatched interface file versions: expected 6041, found 6040
Failed, modules loaded: none.
***************
Here the question:
Is there some workaround to make WxHaskell running with my sistem (GHC 
6.4.1) or I should downgrade to GHC 6.4?