Error when trying to mine

[7up]

Hello guys! Today i recived my new 5870 and i installed 13.1 drivers but when i try to mine then i programs don't even run! At first i tried latest beta drivers and then i had errors like:
2013-04-04 11:59:43: Listener for "Default": api2.bitcoin.cz:8332 04/04/2013 11:59:43, Verification failed, check hardware! (0:0:Cypress, 37948fec)

What should i do? I use guiminer but even cgminer have that same problem!

I mine BTC in slush's pool

[vm1990]

what settings are you using?

go to
File
Create new miner
type what every you want miner to be called
click the miners name in the bar (what ever you called it)

set server to "other"
host: stratum.bitcoin.cz
Port: 3333
username dont forget the "."
set device to use GPU
unselect any CPU cores (causes stales)
then click start