Hmmm seems that you did not see a spike, i am now assuming that your live rock was cured. just a suggestion but try dumping a raw coctail shrimp into the tank, by putting it in it will decay and cause ammonia in turn causing your beneficial bacteria to reproduce. You will notice your levels rising then leveling off, then in turn will start to come down. Once they hit 0 you are good to go. This is just my opinion and are welcome to take whomevers advice you choose.
Welcome and Good Luck