shah,
If you leased license has not expired, try re-entering and saving your mail address here on vb.org. It should be ok the after some minutes.
If that don't work, follow these instructions:
You are currently showing up as unlicensed. To be able to download hacks and/or receive support here at vBulletin.org, we ask you to please click
here (vB-germany users click
here) and enter your email address, to show us that you are licensed.
You will need to use your customer number and password (which will be in the email you got when you paid for your license) to access that page. Please note that your email is case sensitive. The update of your account may take up to one hour.
Thank you.