10 speed ultrashift, 2nd gear flashing?

Hey fellow drivers I have 2010 Volvo Eaton fuller ultrashift and my 2nd gear when I start up the truck is flashing and automatically downshifts to 1st gear and with my help with manual buttons I'm able to shift to 3rd by skipping the 2nd gear and once it reaches to 7th gear it flashes again and dosent want to go to 8th gear, I have replaced my X Y shifter and Harnness ??Any ideas Why is this happening ?

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