Ghost, here's what I posted in another thread...don't know if you read it.
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I'm wondering if you might be having trouble because of the 3D quality of the puzzle...maybe that's what is throwing you off. If so, I have a suggestion. Use a dark pen and draw the puzzle on paper so that it is flat. Each side should be a square. Then use a ruler to divide each square into the number of squares on the puzzle. With a Hi-Liter, color in the squares as they appear in the puzzle. So, you should have to pink squares, 2 green, and 2 yellow ... if I remember the colors correctly. Now, use a pencil to draw a line between the pink and the pink. between the green and the green. and, between the yellow and the yellow. Where you find yourself crossing another color, erase the pencil mark and chart a different path. Once you have the 3 paths marked on the paper, use the color hi-liter to mark along your pencil mark. Then, go back to the online puzzle and input your solution.