Need help ASAP

I have a 2004 Dodge 3500 5.9L. The High Pressure valve(part # 5093113aa) is now spewing fuel out. At first it was just leaking, So i took it out to see if there was an o-ring. When i put it back together it now spues fuel everywhere. Is there a sealant that seals the threads? I just dont see where it seals itself. Can anyone help me please. If you want to call me feel free.

Thanks

Ben

850-516-4974