Having trouble getting a seed to sprout. [View all]

I bought these White Widow seeds a little over a year ago. I used one early last year and didn't have any problems getting it to sprout. That mother plant produced 8 clones and after they were all harvested I stopped growing for the last 6 months. Now bored I thought well I could do another grow during the winter. I have these seeds stored in my refrigerator in a airtight glass jar. Using Crop King directions of soaking a seed in spring water until it sinks, then wrapping it in a wet paper towel between two plates and then placing it in a warm place and checking every now and then to make sure it doesn't dry out. It's been over a week and still not sprouting. So now this morning I started another seed. Did I store the seeds wrong? Any helpful tips on getting my seeds to sprout?