How old/big are your fry? Why do you want to move them? To grow them out? Are the parents still in the tank with them?
Depending on the case, I would suggest taking all the decos out of the tank (if you haven't already done so) and trying again with the net. If they are too small, you could either purchase a fry net and try with that, or you could try making a net (like I have) with a pantyhose as the net part. Takes a little innovation, but is effective! Still, is it really necessary for you to move them at the moment?