What it sounds like is happening, is that your needing to raise the dosage you are taking until you see the liquid movement, and you have 3-5 movements in a day.  This does very, as everyone is different. It actually took me three days initially to find my dosage of 10 capsules.  At first I wondered if it was going to work, and after finding my dosage, I found Oxy-Powder to be highly effective.  I would suggest that you continue to up the dosage until you get to this point as well.  

Another Concern that I could see may be an issue, is that your stomach is deficient in HCL, and if this is the case you may need to use some lemon in the water you are drinking with your dosage.  You may find that this makes the reaction a little more effective.

Because products like Colosan are in a powder form, it is very feasible that you are/where taking much more of these other products than your currently taking with your dosage of Oxy-Powder.  With this in mind, it may take a few more capsules in order to initiate the cleanse.  there is a very low dosage on the bottle to begin with, because it has to be very general, as there are many different types of people using it.  You will see that the bottle says to start with four capsules, and to increase by two capsules each night until you have three to five movements, this is not to say that everyone starts at four capsules and that is your dosage.  

Given that you have yet to find your specific dosage, I can see how you would conclude that Oxy-Powder is not effective, however, Oxy-Powder is highly effective and works very well given the correct circumstances.

I use Oxypower, and I must say, I am a bit confused about the cleansing power. One has a very watery stool; don't have 4-5 bowel movements a day; and I find old parasites in my stool when I do a coffee or water enema, and wonder why didn't the Oxypower remove these dead, almost decaying parasites. I don't see anything resembling mucoid plaque. I really, really don't believe it actually works. I will not buy again. But the Livertrex, does help clean out old green stones and, perhaps parasites when taken with Black Walnut. But the parasites look more like long white ones, although they are decaying.