CentOS - Aug 2008 - Second Xen NIC not being recognized?

I've got a Xen domU running Centos 5.2 (dom0 is also Centos 5.2) with two
NICs configured.  Both NICs show up in the Xen hardware details display. 
Looking at dmesg output from rebooting the domU, I see both eth0 and eth1
appearing there.  But network configuration only knows about eth0, the one
that was installed originally (eth1 was added later).  There's options to
create another NIC in network configuration, but "xen virtual
ethernet"
isn't one of the hardware types I can choose, and choosing the default
doesn't give me anything that works.

Should I try reinstalling the domU with the NIC already in place?  But
even if that works -- shouldn't it be possible to add a piece of hardware
to a system and have it recognized on reboot?

-- 
David Dyer-Bennet, dd-b at dd-b.net; http://dd-b.net/
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>Both NICs show up in the Xen hardware details display.
>Looking at dmesg output from rebooting the domU, I see both eth0 and eth1
>appearing there.
By chance did you set the macs manually? Are they valid, look for a typo?
I recall hearing about this behavior in lieu of that mistake.

jlc