Question regarding Nessus 2.2, Missing Hydra and other options in unix client.

I've been running Nesses on RedHat 9 since version 2.0.9 or so.
Recently I upgraded to 2.1 via a RPM download through Synaptic
(apt-get).  After that package installed I do not have the Hydra options
in my preferences anymore.
 
To attempt to fix the problem, I downloaded the latest 2.2 version last
night from the nessus.org site and got the "package gtk+-2.0 not found
but will continue without GUI" message.  I tried to update GTK+ via RPM
and it has conflicts with other modules so I cannot install it at this
point.
 
So my question is this:  Is there a simple reason that my Hydra options
may have disappeared, and is there a path someone could suggest to
troubleshoot this issue?
 
Thanks,
 
Karn

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