As long as you've followed all of my advice in the post above and haven't added any liquids or flavourings which could have made it seize, then don't worry, it's salvageable! Problems blending can happen if your food processor/blender isn't quite up to the job, if the almonds haven't been roasted, or due to the quality of the almonds used. Quality, environment during distribution and storage, and packaging varies hugely and this can affect how they blend. If you are struggling, add a little neutral oil to the blender or food processor 1 tablespoon at a time until things get going and it starts turning creamy.