Problems with grab

Hi Greg:

I am using grab-0.2.30

For some reason grab is not picking up all the rpms from the servers. for
example:

I have installed:

[anp@abril anp]$ rpm -qa | grep nessus
nessus-devel-1.0.9-1ANmdk
nessus-1.0.9-1ANmdk
nessus-plugins-1.0.9-1ANmdk
nessus-client-1.0.9-1ANmdk


In the mandrake server there is available nessus-1.1.13-1mdk

However, grab only picks nessus-libs-1.1.13-1mdk as new, but does not pick up
the others as upgrades. what gives ????

Regards,

Agustin