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LTC4040 No Charging Battery

Hello to Everyone,

i have an issue with LTC4040, no way of let it charge battery (i use a Li-Ion) , i tried every solution/proposal found in this site with people that had the same issue, but nothing worked.

With the  oscilloscope, the igate of the Mosfet (i use the one suggested in the datasheet , a "SIR424DP-T1-GE3") has a "saw pattern" , as you can see in the picture, without it's linear, as it should be.

i also checked the voltage dividers , the pfi and the vsys, but both with or without battery has the same voltage, i am in a mindloop, i am really out of ideas..

Thank you for everyone that will help me , or at least will try with me!

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