SLI Configuration Options Missing [2x 760's]

[matiu]

See Below For Rig
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Hey guys,
I'm having a pretty bad problem at the moment. I recently purchased 2 Asus GTX 760's for my rig. I was hoping to SLI but after I installed the Cards and the Bridge I am not seeing the "SLI Configuration" menu in my nVidia Control Panel, all I have is the default "Configure Surround, PhysX" menu. I can confirm that it see's both cards, it's just not recognising the SLI connection. My motherboard supports SLI so I can't see what's wrong.
Is it common for SLI connectors or bridges to be DOA? Also, Is there a specific option in my BIOS to enable SLI (I haven't found anything)
Things I have tried;

Re-seating cards.
Swapping the cards over.
Updating BIOS.
Connecting SLI bridge the other way round.
Using default drivers and also latest drivers.
Uninstalling Drivers and starting from scratch.

Any help would be GREATLY appreciated as I have had problem after problem with GPU's and other components on this rig, it has been a nightmare!

Regards,
Matt
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My rig;
AMD 8350 FX
8GB RAM
ASUS M5A99fx Pro R2.0
ASUS GTX 760 (x2)

 

[cooldex]

my ideas was every thing you did but both gpu's work independently to make sure non is doa