It could be that or that your searlug is not catching your sear. If Jims advice doesnt fix the problem, try lowering it a little bit. Remember....S--F-A--E. Now if you read the sticky, you should know what that means.
If your LPR is stock, this shouldnt be a problem, but if you recently installed an aftermarket LPR, it may need to be turned up a tad.