Updated to latest firmware cannot heat nozzle

I have updated to lateset firmware and had to use RRF config tool to remake config file I cannot turn on Nozzle heat gives me M568 P0 A2 the M568 command is no longer needed how do I turn oh the nozzle heater

Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.16 on Thu Jul 27 2023 13:22:04 GMT+0200 (Central European Summer Time)

Edited 1 time(s). Last edit at 07/27/2023 03:13PM by sgtmrcooperusmc.

It sounds to me that you are still running an older firmware version. Send M115 to check the firmware version.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

I get error when start up cannot find heater7

7/28/2023, 4:28:34 AM M115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.1.1 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2020-05-19b2

I get this code when installing update firmware Error: M997: In-application programming binary "Duet2CombinedIAP.bin" not found

You were correct It was not flashed with 3.0 I found the IAP.bin file uploaded it and installed FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.4.5 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2022-11-30 19:36:12 to current firmware ver

now everything works correctly

Thank for the help