The petition you received is called a "Petition to Terminate Compensation Benefits." Your employer filed the petition because they believe that you have recovered from your injury and can now return to work.
A workers' compensation judge will decide if your payments will stop. Until those hearings take place, you should still receive your workers' compensation benefits and payments. If you've received one of these petitions, we highly recommend you contact an attorney if you believe you're still too injured to work, or if your personal doctor hasn't released you to work.