BosoZ - damaged FETS ?

Today I finally could test my BoSoZ and get to listen to it. Unfortunately I've made something wrong, 'cause I measure 118 volt on drain of Q1 and Q2, where it should have been +30 volts. When turned on the amp plays (very quietly) for 10 sec and then fades out.
PSU works fine and I get 60 volt.
My amp is unbalanced only and I use 10K pots at P1 and zeners at input.
Any hints? Maybe I was not handling my FETS with care when I soldered them in on the board....