GreenPois0n not working?

[Rokurai]

Well, I had 4.2.1 a bit ago, and jailbroke it with GreenPois0n. I accidentally went to 4.3.1, and had to downgrade. Now, when I try to jailbreak with GreenPois0n, it just stays at "Jailbreaking.." and the meter doesn't move; and it sticks my iPod in the 10XX recovery loop, which I fixed using Tiny Umbrella. This is the latest version, that I downloaded straight from the GreenPois0n website. Any help would be appreciated a lot, thanks in advance.
-Rokurai

EDIT:
It works now, but my iPod is stuck on this:

-----------------------------------
Greenpois0n
http://www.greenpois0n.com
-----------------------------------

Unable to find gBdevList
Unable to find fs_mount
Unable to find fs_load_file
Greenpois0n initialized

EDIT2:
My iPod just restarted after the jailbreak, and the loader icon isn't there.