Cant get HDRAGC shift_u in avisynth

[bcn_246]

I have this script, I have installed the latest HDRAGC and I use the following script:

avisource("video.avi")
convertfps(25)
lanczos4resize(640,238)
HDRAGC(shift_u, shift_u < 0)
deflicker()
msharpen()

However, VirtualDub says it doesnt know what shift_u means, what exactly am I doing wrong?

Thanks, this is kinda urgent.

[mgh]

should be afaik
HDRAGC(shift_u=-n)
where n is an integer
i.e.
HDRAGC(shift_u=-1)
HDRAGC(shift_u=-2)