I can't see how it relates to the error you describe unless there are earlier errors you don't describe, but the line:

$VERSION = 0.9;
[download]

in the Syringe code shouldn't compile. That would prevent Syringe loading and would generate compile errors (but not the error you describe).

Failing that being helpful you'll need to provide enough code to reproduce the problem. I suggest removing everything from Syringe that doesn't affect the problem and if that doesn't turn on a light for you post the result here. Note in particular that you should remove references to other modules first!