Confused about forward zones

[Treptow, Craig]

Hi.  I'm getting quite confused on what I believe to be possible, but can't
yet get working.  What I want is:

All queries of domains hosted by nameserver1 are resolved by nameserver1.
All queries to nameserver1 of *.prodplex.principal.com and 162.131.250.* are
forwarded to pfgmvs5, resolved, and returned to the client doing the querying.
All other queries are sent to the Internet for resolution.

I have:

pfgmvs5 (162.131.250.150) - BIND 4.9.1,  hosting prodplex.principal.com
nameserver1 - BIND 8.2.2-p5, hosting principal.com
nameserver1 has in its named.conf:

zone "prodplex.principal.com" IN {
        type forward;
        forward only;
        forwarders { 162.131.250.150; };
};

zone "250.131.162.in-addr.arpa" IN {
        type forward;
        forward only;
        forwarders { 162.131.250.150; };
};

and records such as: 
wlmftp          IN      CNAME   wlmftp.prodplex.principal.com.

Queries of pfgmvs5 work fine.  Queries of a CNAME record pointing to
?.prodplex.principal.com to nameserver1 return the CNAME record, but don't
continue on and resolve down to an A record. Reverse queries of 162.131.250.*
to nameserver1 also don't seem to be forwarded.

There must be something I'm not understanding correctly and would appreciate
any help.

Thanks!

Craig Treptow
Principal Financial Group
I/S Network Administration
(515) 247-6207