How do I submit new parts?

[Willy Tschager]

I made .dat and tested it in stud.io. 
How do I submit it to ldraw.org?
On the parts tracker side under "submit" it just says:

Sorry, your userid (Wiktor) must have submit privileges in order to submit files.

btw, the part I made:
Motorcycle Chassis, Snowmobile 37496

To submit parts, you must be authorized as an author on the Parts Tracker and have read and affirmed the Contributor Agreement.

To become authorized as an author you must first register with the LDraw.org Forum (it's free) and then send an email to the Parts Library Admin (Chris Dee) with your true first and last names and your LDraw.org username. You must also include the statement "I accept the LDraw.org Contributor Agreement with regards to all past and future contributions I make to LDraw.org".

w.