  We present the first results of a high-resolution study of the distribution
and kinematics of molecular gas in two nearby radio galaxies, 4C31.04 and
3C293, representative of two different stages of evolution in radio-loud active
galactic nuclei (AGN). These observations, conducted with the IRAM Plateau de
Bure Interferometer (PdBI), map with unprecedented spatial resolution (0.5"-1")
and sensitivity the emission and absorption of key molecular species such as
CO, HCN and HCO+. We report on the detection of a kinematically disturbed and
massive (Mgas~10^10Msun) molecular/dusty disk of ~1.4kpc-size fueling the
central engine of the compact symmetric object (CSO) 4C31.04. We also report on
the detection of a massive (Mgas~10^10Msun) regularly rotating ~7kpc-size disk
in the FRII radio galaxy 3C293. A complex system of molecular line absorptions
is detected against the mm-continuum source of this galaxy (AGN and jet). We
compare the properties of the molecular disks in the two sources and discuss
them in the light of the different theories describing the evolution of radio
galaxies.
