I have a specialized rockhopper. it doesnt have a square taper crank. I go to remove it with the parktool cp44 spline crank puller and it doesnt work it threads in but never omes off. Ive watched numerous youtube videos on how to use one and I swear im doing it the same way. Ive also tried it on my other bike, a motobecane fantom comp which doesnt have a square taper crank either. Am I just a dumb*** or is this the wrong tool for both bikes?

You just tighten the crank puller into the crank, then turn it clockwise, so it tightens. That will force it off.

NOTE: There is a crank-spindle interface called "power spline" that uses a spline spindle. The crank bolt is an 8mm thread. Because the hole in the spindle is small, use the CCP-22 or CWP-7 for this crank, the same tools for a square spindle.

From here:https://www.parktool.com/repair/readhowto.asp?id=120

I don't know if this is the situation, but older Specialized OEM cranks used this "power spline". It should say somewhere on the crank if it hasn't rubbed off already. This was very annoying when I first found this out.

okay. I have the CP22 also I just didnt think it would work since it was square taper. ill try that one tomorrow.

what crank do you have? did you leave a washer behind when you took the crank bolt out?