You shouldn't need to press that hard. I used to have the same problem on the 1st fret of E and A (but not D and G, go figure). I had 2 problems:
- I wasn't fingering the note behind the fret but on the dot/marker, or sometimes even near the nut and;
- I needed to stretch my arm out too far to reach the first fret which reduced the amount of pressure I could easily apply.
Practicing to hit the 1st note right before the fret and adjusting the strap to lift the bass an inch or two really helped, and in the meantime I worked out how to play those songs on my 5 string...funny thing was when I did that, the guys reckoned "Tainted Love (Soft Cell)" never sounded better and wouldn't let me back onto the 4 to play it
