Convolution.vi isn't working properly

I'm using LabView 7.0 and I'm trying to performing a convolution with the convolution.vi. This VI isn't working properly. As you can see in the attached file, the result isn't right even for very small input arrays. The result also depend on the input data format (singel or double etc.)
May be someone had the same problem, or knows something about it. I'm using LabView 7 on an Windows NT system, may be that has something to do with it.
Would be greatful about every hint,
best regards Andy
Attachments:
example_convoultionvi.vi ‏18 KB

Very strange...
Can you open the diagram of the convolution.vi, then double-click on the "Call Library Function Node". What is the Path? (It should be C:\Program Files\National Instruments\LabVIEW 7.0\resource\lvanlys.*).
Could ot be yours points somewhere else?
Now find the lvanlys.dll in explorer. The size of the LabVIEW 7.0 version should be 528384 bytes.
Do a search for lvanlys.dll. How many different versions show up?
LabVIEW Champion . Do more with less code and in less time .

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