Cgminer simply wont run it says "started cgminer 3.0.1 but than never starts mining...


guiminer just keeps giving me this error:

2013-05-06 12:57:45: Listener for "Default": api2.bitcoin.cz:8332 06/05/2013 12:57:45, diverted to stratum on stratum.bitcoin.cz:3333
2013-05-06 12:57:52: Listener for "Default": api2.bitcoin.cz:8332 06/05/2013 12:57:52, Verification failed, check hardware! (0:0:Cayman, b8038fef)
2013-05-06 12:58:15: Listener for "Default": api2.bitcoin.cz:8332 06/05/2013 12:58:15, Verification failed, check hardware! (0:0:Cayman, 3120f96c)
2013-05-06 12:58:47: Listener for "Default": api2.bitcoin.cz:8332 06/05/2013 12:58:47, Verification failed, check hardware! (0:0:Cayman, bbccefb0)
2013-05-06 12:58:49: Listener for "Default": api2.bitcoin.cz:8332 06/05/2013 12:58:49, Verification failed, check hardware! (0:0:Cayman, 82a70289)