[GnomeMeeting-list] I couldn't install the packets in Mandrake 9.1

[xwang3 umsis miami edu]

Hellow everyone, 
 
I use Mandrake 9.1 in my computer. When I installed the gnomemeeting 
packets, there was mistake, saying, 
 
The signature of the package 'openh323-1.12.0-1.i586.rpm' is not correct: 
No GPG signature in package. 
 
So I couldn't continue the installation. Could you give me some advice on how 
to solve it? Or I have to use other version of Linux? Thanks in advance! 
 
 
 
Xiaochun