Can'r register on MTN site?

[NeonNinja]

So, I got a new MTN sim card, so I registered my old number there about 3 years ago or so.
I get stuck on the screen which says

Registration
To confirm that we have your correct cellphone number please enter the following code into your cellphone. This is free of charge.

Type *126*1301# into your cell phone
USSD pending.. Last updated on 5/15/2011 10:59:10 PM

Anyone encountered this, and how it be solved?

www.mtn.co.za