AMD X2 Dual Core only showing as Single Core

[mug2k]

Hi

I installed my new AMD 64 X2 4000+ a few days ago (did have a AMD 64 3000+) and just realised that only one core is being utilised. I've flashed the bios, installed AMD drivers and changed from uniprocessor to multiprocessor in device manager. I'm still only getting one cpu graph in task manager. I don't know what else to do, has anyone had the same problem ?

Thanks,
Marcus

p.s. I'm using XP Pro

 

[mug2k]

I just took the old one out and put the new one in. It detected it correct (2.4Ghz) but only one core is showing

 

[mug2k]

I'm pretty sure it did say X2, I don't feel having another look

 

[mug2k]

its defo a single core, bloody eb*yer

They ain't getting a penny more of my dosh.