Toan Assaly

I am currently experiencing an issue where my aircraft is unable to begin taxiing despite having completed all necessary preparations. The parking brakes have been released, the chocks have been removed, and all required pre-taxi procedures have been properly executed. However, the aircraft remains stationary, and I am unable to determine the cause of the problem. I would appreciate immediate assistance in troubleshooting this situation. Please advise on any further checks or corrective actions I should take. Thank you for your prompt support.