First, don't worry about this year or last years rules, problems and solutions are the same. Its still a rubber powered duration plane.
If you haven't flown more than a few seconds we really need to start with the basics and need to know more than it crashes in two seconds.
What design plane have you built and tried to fly? Was it a kit, which one. A design off the internet, which one. Own design, please give a detailed description. This is critical because you may be trying to fly something that just won't work and anything we say won't help.
Once we know your design, we need to know more about the execution. How well built, weight, "straight", center of gravity, control settings, etc. Those have to be close to right to get even a good design flying.
From there we'll need to know something about winding technique, rubber, etc. But frankly I don't see those as the problem, you should be able to get a good slow glide if the above is correct even with bad rubber or poor winding.