What version of Premiere Elements? What computer operating system?
What are the properties of your source media including interlaced or progressive frame rate? What is your project preset? Are you working in a NTSC or PAL set up? Are you maintaining a NTSC or PAL workflow and not mixing?
These programs do have anti flicker options. One is typically under Field Options, and the other is under Motion Panel expanded.
More details on locations once I know version of Premiere Elements.
The answers will be in the details. So, please consider, and give details. Any questions or need clarification regarding any of the above, please do not hesitate to ask.