During a fishless cycle, you don't do any water changes until after the ammonia spikes and drops and then the nitrite spikes and drops. The you do a big 75% to 90% water change just to remove the high nitrates that you will have. What temperature do you have the heater set at? Fishless cycling works best when the water temp is 85F to 90F as higher temperatures promote bacteria growth.
If you do have the temperature in that range, do you have an airstone in the tank? The higher temperature drives the oxygen from the tank and you need extra surface aggitation to replenish it. The best way to achieve that is with an airstone.
Did you use a dechlorinator such as Strees Coat or Prime to kill the chlorine in the tap water? If not, then the chlorine is killing off the bacteria before it can develop. Are you using any other productsbesides the Cycle? Some water conditioners say they "remove ammonia". If you are using something like that, the tank won't ever cycle as the ammonia is being removed by the chemicals rather than by bacteria.
Also, I think the use of Cycle is pretty much useless. I really don't think the "bacteria in a bottle" products like Cycle do any good at all. I intend to experiment with them during the course of the year to either prove of disprove that.
Click the link on fishless cycling in my signature and read it. I think it may clear up some questions you have.