script-fu 'parametric curves'

Ok so I downloaded “Parametric curves” via save as kept original file name and I put it in my script folder inside gimp just like I did with my layer affects which is working just fine. Having said that I should point out I am running Windows 7, 64bit and Gimp 2.6 so this logically should work after I refreshed my scripts right? Nope, it’s not in the drop down menu, so I deleted the script and downloaded it a second time and nope, nothing happened again. As a matter of fact since that was the first script fu that I downloaded right after I refreshed it using filters >script-fu>refresh scripts and restarted gimp the Script-fu icon should have showed up on the toolbar and it did not. –sigh- However when I downloaded and added the “Layer affects” in the same manner Script-fu ended up on my toolbar and I can use the effects just fine, but the “parametric curves” is still not showing up. Any Ideas what could be wrong?