I cant find the breath (sometimes i can but the majority of the time i cant)

• i cant notice the rising and falling of the stomach even when lying and putting my hand on it and also to motice the breath in general is very hard for me

no i understnad i can say if i dont notice it "knowing" or "breath" ect - but than i wait and wait and nothing - and in the mean time lots of secondary objects come up - if i follow them though its not good- because you should have a primary object to build concentration so i need an "anchor"

so when i say "knowing"*3 and than what should i do ? just focus on my belly ? and if i dont feel anything ? not even in other areas like the nose - what should i do - focus harder ? follow secondery objects only ?

I practice for a long time now (did retreats ect) and i thought this problem will fix itself but i still have this problem - when i meditate i do 1 hour walking than 1 hour sitting (mahasi style)