Pixhawk 4 ESC Problem --- please help

I'm a building this hexacopter. There's this beeping ESC motors. I spent countless hours looking for solution. Somehow I just can't get motors spinning.
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Please help.
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Here is the list of part that I have for the drone.
Pixhawk 4
- Holybro Transceiver Telemetry Radio modules V3 Set 915Mhz / 433Mhz RP-SMA modules
1355 carbon propeller
- Motors: Tarot Brushless Disc Motor 4108 380KV 6S
Model : 4108
KV : 380kv
Stator diamater : 40.6mm
Stator height : 8mm
Stator : 24N
Poles : 22P
Motor shaft : 4mm
Dimension : Φ46×24mm
Weight : 93g
Idle current (A) : 0.5A
LiPo : 6S
Max thrust : 1620g
Internal resistence : 135mΩ
Mounting : 32mm circle
here is link to the product website (Motors) for specifications :--- www.tarotrc.com...
- ESC: Hobbywing XRotor Brushless ESC 2-6S 40A SimonK No BEC High Refresh for 4-Axis 6-Axis Multi-Axis Electric Adjustment Specification of ESC
Input: 2-6S lithium power
Continuous current: 40A
Instantaneous current: 60A (10 seconds)
Size: 68*25*8.7mm
Weight: 26G
BEC Output: None
Plug: 3.5mm Banana Plug
Programmable Projects: Increment Angle: High/Middle