laminated wood, now in english

Hi there. So, this is my first and failed attempt to make a curved laminated wood girder. I used 1.5mm thick poplar wood (salvaged from fruit and vegetable crates), which is somewhat like balsa wood, only more crap. The form was made to simulate the rear fork for the velomobile, which i think it will be better off by using carbon fibre. Anyway, first i tried to directly bend the veneer, ended in catastrophic failure of the wood. Second attempt, I put the wood in some water, left it for 5 minutes, and the gently bent it into an aprozimate shape, after which i left it to dry overnight, on the radiator in my room. The next morning came the glueing, For which I used Moment watertight wood glue. Put glue on the faces, clamped it, and left it 24 h. After i removed the clamps, it all seemed to work just fine, until i stretched the girder. Again, catastrophic failure, but the glue gave in. I remember using this glue last year, and it said on the instructions that when glueing porous materials like wood, one should first apply a layer on the wood, let it dry, only after that the actual structural layer can be applied. I didn't do that, so, it kinda failed. I am doing one more attempt by using this technique, hopefully it will work better. If not, someone could direct me to some more specialized and potent glues. Cheers.