Verification failed, check hardware! (0:0:Cedar, ed7d668a)

[DSage03]

I'm new to mining and i've been combing this site and the net for solutions to my problem. So far no luck

Info:
Windows 8 x64 / ATI Mobility Radeon HD 5470
Guiminer v2012-12-03
I'm using the latest graphics drivers

When I click start it attempts to connect and then I eventually get the verification failed error. It displays my hash but it also shows no shares accepted.

The log:
2013-12-04 10:13:19: Listener for "Slush's Pool" started
2013-12-04 10:13:35: Listener for "Slush's Pool": 04/12/2013 10:13:35, started OpenCL miner on platform 0, device 0 (Cedar)
2013-12-04 10:13:35: Listener for "Slush's Pool": stratum.bitcoin.cz:3333 04/12/2013 10:13:35, checking for stratum...
2013-12-04 10:13:36: Listener for "Slush's Pool": stratum.bitcoin.cz:3333 04/12/2013 10:13:36, no response to getwork, using as stratum
2013-12-04 10:13:37: Listener for "Slush's Pool": stratum.bitcoin.cz:3333 04/12/2013 10:13:37, Setting new difficulty: 3
2013-12-04 10:14:13: Listener for "Slush's Pool": stratum.bitcoin.cz:3333 04/12/2013 10:14:13, Setting new difficulty: 1
2013-12-04 10:16:43: Listener for "Slush's Pool": stratum.bitcoin.cz:3333 04/12/2013 10:16:43, Verification failed, check hardware! (0:0:Cedar, ed7d668a)

My OpenCL is fine and i'm not currently overclocking my card. Any help would be MUCH appreciated.

[lindeanin]

Try bitminter with its mining program, easy to use, at least for me.

[DSage03]

Thanks for your recommendation lindeanin. I've been testing bitminter over the last few days and i'm glad to say its mining away. Dunno what the problem with the other miners was but i'm not complaining! Nice little program too. Thnx again mate