  We report the detection of molecular CO(1-0) gas in F00183-7111, one of the
most extreme Ultra-Luminous Infrared Galaxies known, with the Australia
Telescope Compact Array. We measure a redshift of 0.3292 for F00183-7111 from
the CO(1-0) line and estimate the mass of the molecular gas in 00183 to be 1
$\times$ 10$^{10}$ M$_{\odot}$. We find that F00183-7111 is predominately
powered by the AGN and only $\sim$14 per cent of the total luminosity is
contributed by star-formation (SFR $\sim$220 M$_{\odot}$ yr$^{-1}$). We also
present an optical image of F00183-7111, which shows an extension to the East.
We searched for star-formation in this extension using radio continuum
observations but do not detect any. This suggests that the star-formation is
likely to be predominately nuclear. These observations provide additional
support for a model in which the radio emission from ULIRGs is powered by an
intense burst of star-formation and by a radio-loud AGN embedded in its
nucleus, both triggered by a merger of gas-rich galaxies.
