VPP - Velocity Preprocessor

I'm trying to use the include directive to insert a content of another file in my template. I tried many possibilities unsuccessfully. I got a simple example from velocity site and it worked very well with Texen. I'd like to know if there is a work around to solve this problem.

Thanks in advice.
Vinicius

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test.vm content:

#include("test.txt")

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test.txt content

Only a simple test
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Error message

[vpp:copy] [error] Cannot process content resource : org.apache.velocity.exception.ResourceNotFoundException: FileResourceLoader Error: cannot find resource test.txt
[vpp:copy] [error] ResourceManager : unable to find resource 'test.txt' in any resource loader.
[vpp:copy] [error] #include(): cannot find resource 'test.txt', called from template vpp at (3, 1)