How do I add a second IP range to a network?

["Helber" <helber@netnauta.com.br>]

 Hi all
 
 I have a IP block working on my server. how do I add a new IP block?
 For example 192.200.234.128 with  net mask 255.255.255.192 (what gives me
 192.200.234.129-190)
 
 and I whant  to add a second IP range 192.200.234.192 with  net mask
 255.255.255.192
 
 I put it in the named.conf, and create a .IN-ADDR.ARPA) but it seams I
 forgot something.
 
 I apreciate any help.
 
 Thanx in advanced.
 
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