There is no problem with your profile, not receiving early invitations is normal with new freelancers.
I would suggest you to keep patience and keep bidding on projects matching your skills set, as I also got my first job after three months of joining oDesk.
Best Regards & Good Luck
Well, I guess it's perfectly normal to have a hard time finding your first job... It took me about three months to get mine. But, since then, things started to get better and better. My advice is to keep on applying to job postings: soon or later you'll get hired :-)
―Stephen King, The Gunslinger