Same thing happend to me. 2 years of work down the drain in 10 minutes. Oh well. Is what I did is uninstall it though add/remove programs, delete every trace of the game on my computer, and reinstall it. After that, I reinstalled LL, and tried it. Still didn't work, patched it, and it worked. It's a really stupid thing for Hasbro to do, adding the anti-cheat code in there. I have vowed to never use trainers or the drexler patch again.
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I want my Hay Bayler back! Forget new rides! HAY BAYLER! While they are at it, why not bring back Tidal Wave too?