I cannot get my fingers to work in hammer-ons

[Eko]

9. I do finger exercises every time I play guitar for 5-10 min.

I start on the low e 1st fret and fret it with my 1st finger play that and keep it down then low e 2nd fret 2nd finger play that and keep moving up using the 3rd then 4th then I move and do the same thing on the a string then d string all the way up and then back down keeping my fingers down when ascending. A harder one is the same thing but you keep your fingers down at all time till you need it so when you get to the a string your 2nd, 3rd, and 4th finger are still on the e string on the 2,3, and 4th fret and stay there till you have to use the finger on the next string so when you go to the 2nd fret a string your 1st and 2nd fingers are on the 1st and 2nd frets of the a string while you 3rd and 4th fingers are still on the e string 3rd and 4th fret and keep going all the way up.