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i'm not sure what the module is :S
but it looks like either some permissions are wrong on the server..
but what sticks straight out at me in the error message you gave is this:
Warning [PHP]: file(C:\\phpdev\\www\\public\\TV De Witte Raven\\Ledenlijsten\\Ledenlijst.csv)
the double slashes, maybe a lack or a bug in the strpslashes function.. i'm not a coder so i couldn't tell u exactly what's what..