The LULU Security check makes many tries over time. 

If you are sure your LULU main HUD   (see below), then it could mean one of two things:

• your sim has issues. Is it a Homestead? Homesteads are more problematic than full sims. Try clicking "@Lulu" on your HUD and let Lulu know the details, including all messages, and the sim name.
• the LULU HUD is borked. SL borks stuff from time to time. Try *HUD Menu  > HELP... > New HUD...* and transfer everything over.
• If necessary, you can re-setup the gear. *HUD Menu > HELP... > resetup...*.