Problems after Jailbreakme.com

[Luuu]

Hello,

I have an iPod Touch 2G MC-model
I upgraded it to the 4.0.2 version, and downgraded it then to the 4.0 version.
Then I jailbroke it with jailbreakme.com, when my Ipod restarted, there were some strange pixels over the apple-symbol (which is normal) and it seemd to respring.
Then it booted normaly, I updated Cydia, and then the touchscreen didn't work correctly, it openend things, I didn't pushed, and I didn't manage to slide the 'power off' button, so I shut it down with the ON/OFF and Home-Button.
When I restarted the Ipod, it was in recovery mode. And I always have to restore it, when I restart the Ipod. Although the jailbreakme.com jailbreak is an unthethered Jb, so I ask if someone has the same problems or has an idea how to fix that.

It really sucks, and the only SHSH's I have 'on file' are the 4.0 one's.

[i.Annie]

Jailbreakme doesnt work right on 4.0.2...

Shift+restore to 4.0.1 then run jailbreakme again.

[Luuu]

I don't have 4.0.2, I downgraded to 4.0

and new problem: the ipod doesn't boot anymore

when i connect it to my pc, it's not recognized, the screen stays black, and nothing happenz.
I'm now trying 2 hours to put it in DFU, but that doesn't work either.

I don't think jailbreakme is a very nice jb...