freescale BDM on 9S12,RESET PIN stuck low

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Something in a new circuit that i built is wrong:in other amatorial board
that i made using 9s12 if i check the reset/ pin on the BDM connector it is
normally high.
In this last one it is normally low.
I have 5 V supply on VDDX,VDD1,VDD2,VDDR.VDDA and relative grounds,an
external oscillator connetted to EXTAL

My question is :How to implement  the minimal condition to have a
9S12E64CFU(80 pin) talking with programmer via the BDM connector?Why my
condition is not enough?

many thanks
Diego



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