Just call or e-mail trulia support and have your MLS ID numbers hady for them to verify that you are the listing agent/broker. Technical glitches are normal when dealing with the high number of listings being entered and modified. Could also be that the listings were falsely claimed by another?
Could be a bigger issue here. MAKE SURE that the email address in your Trulia profile matches that of the one in the MLS> That's how they usually link it. Also, then find one of your listings and click CLAIM IT. That should start the process. If not, call Trulia support. They are VERY helpful :)
Have you claimed them as the listing agent? If not you'll need to pull them up and claim them. Also there are limited editing privleges thatnks to a terrible arrangemetn between Trulia and ListHUb which distributes them to Trulia through an arrangement with TMLS. I understand that the new MLS system rolling out this fall will enable agents to opt out of ListHub if we choose to and to distribute to the sites we want to more easily, though I've not seen the systme and played with it yet.
I find there's about a 36-48 hour delay between putting them into the MLS and when they appear on Trulia/Zillow etc.
Email the Trulia help desk for support. Your listings should automatically appear a day or two after you list, unless someone else is claiming them on the site (doubtful but a possibility). Hoped it help and best of luck.