It's tricky - you are not using "SafeBoot" - you are using Drive Encryption for HP ProtectTools. It's a HP product.
The correct process is that you need to book a ticket with HP - they will redirect the ticket to McAfee support if you are eligible, along with all the details etc. As you don't have any relationship with McAfee, and as you're not a McAfee customer, and you're not using a McAfee product, they simply can't take a call direct from you :-(
What you'll need though of course is a copy of the correct version of SafeTech on some bootable media, and as you say, your usb stick with your recovery code on it - as long as you can get both of them there's a good chance you can decrypt your data.
Thanks a lot for your help, do you know from where can I dowload SafeTech ?