Thanks for your reply.
I got a LED RGB Wire maby 2 meters. Link: http://goo.gl/KjHj58
I tried to connect the laser with shorter wire and was able to get it to about 1A with only 8cm of wire between driver and laser.
I also followed your tip about 5,5V instead of 6,5V.
With 5,5V i got max 550mA and with 6,5V 750mA.
I thought that i has good knowledge with electronics but this laser making me nuts 😉
Do you have a link to someone who sell a driver that we know working well.