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Dependency problem with mpr.dll

Hi!
 
I'm using a WTC.DLL  developed under Visual Studio 2005(C, C++), witch communicates with LabView 8.5 (with .NET 2.0) and under WinXP.
 
My code (in LabView) is very simple, just a call to "Call Library Function". The calling convention is C.
 
I used the application depends.exe and it shows a problem(in red) with MPR.DLL
And when i run the vi, it reports an error "WTC.DLL not found" and it closes the LabView, altought i already registered it in the system.
 
I installed the .NET 3.0, but with no sucess reggarding the error (in depends.exe and the vi).
 
The strange thing is that this code and DLL already worked with an older hardware (Pentium 4, 256MB RAM). Now i have a new PC with a quadcore and 2GB RAM.
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Could you please post ur code or a screenshot of ur error message?
 
Mathan
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lixo1.jpg and lixo2.jpg are the errors.
lixo3.jpg is my code. 
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