auto complete script problem with tabs

I have a question related to the Auto Complete script I found at PHP Guru website.

I have tried to use this at the following location:

http://211.judbeall.com/211/tab/index.asp

As you can see, I'm also using a different script to create those tabs. I have added Auto Complete to the first form field, Overall SLA. However, when you begin typing (use an A) it shows up at the bottom and not hear the form field.

Can you please help me?

Thank you