Unknown options for package siunitx

I'm getting an error when I try to specify an option with the siunitx package. I have the following line in my preamble:

And I get the following error:

! LaTeX Error: Unknown option `load-configurations' for package `siunitx'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
...

l.3894 \ifx
\@empty\si@emulate\@empty\else
? H
The option `load-configurations' was not declared in package `siunitx', perhaps
you
misspelled its name. Try typing  <return>  to proceed.

I'm not sure which version of siunitx I have; I installed it via the texlive-* packages in Ubuntu 10.04 (Lucid). If somebody could point me in the right direction I would greatly appreciate it.

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Welcome to TeX.SX. Unfortunately, the TeX Live/Debian provided with Ubuntu 10.04 is quite old, so the provided siunitx lacks that option. –  egreg Sep 12 '11 at 15:00