FreeBSD USB Install

[Brian McCann]

Hi all.  I'm trying to install FreeBSD 7.1 off the CD to a USB thumb
drive, but every time I try it fails.  sysinstall says "Unable to make
new root filesystem on /dev/da0s1a1.  Command returned status 38".
When I switch to the debug console, I get "cg 0: bad magic number".
This thumb drive was being used on my Windows machine previously, then
I re-formatted it as UFS to use it on a FreeBSD machine...so I know
the thumb drive itself works.  Can someone shed some light on this
problem?

Thanks!
--Brian

-- 
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Brian McCann

"I don't have to take this abuse from you -- I've got hundreds of
people waiting to abuse me."
                -- Bill Murray, "Ghostbusters"