Can't get my ammonia levels down. Help?

I am doing a fishless cycle and have only added ACE 10% ammonia to the aquarium once to get the cycle going. I was told to add 1 teaspoon of ammonia for my 29 gallon aquarium so I did this on (05/30/2011) its been a week now and my ammonia levels are still the same as they were the first day I added it in. I just got through doing a PWC and the level is still the same as before the PWC I am using an API master test kit and I can't really tell but it's giving me a reading between 2.0-4.0ppm but no niTRITES, the pH is registering at 7.6 I know the higher the pH the more toxic ammonia is. So should I keep doing PWC until I can get the ammonia to at least 1.0ppm or lower?