Bind 9.1.0 on Solaris?

[Ivica Popovic - YYZ]

Hello.
I have on my internal network 2 name servers on Sun Solaris machines.
Primary is on Solaris 2.6 and currently running BIND 4.9.4, and secondary is
on Solaris 2.5.1 running BIND 4.9.3. 
I want to upgrade to BIND 9.1.0 but I am not shure is it possible to install
it on Solaris 2.5.1. If it is not possible please advise what to do.
Thanks.

Ivica Popovic
Network Administrator
Signature Vacations
Phone: (416) 934-2406
Email: ipopovic at signature.ca