I have never rolled before that's the thing.
have you tried railing them? i thought i was immune to mdma, the first time I took two mollies, the same stuff my friends were, and they were rolling out of their minds, and all i got was a little bit of unpleasant jaw clenching and heart racing. the second time i tried it, a couple months later, i took five mollies one night over a period of eight hours just to try to feel something (I don't recommend this btw, I was super down for the next few days), and while my friends took like three of the same capsules and rolled super hard, i felt next to nothing.
I bought a random pill at a concert but decided to take it home and test it first, and it turned out to be mda. A few weeks later, I took it at another concert and after three hours I still wasn't feeling anything, major bummer. Then one of my friends suggested railing, and she gave me a molly capsule. Not so great for your nose, it kinda burned, but after 20ish minutes I finally felt like I was coming up and it only got better from then on out

I took one more the same way an hour later.
I think some people just absorb the stuff into their systems differently. If you're comfortable trying a different method, give it a try.