basic control not working for me

I really like the web site and was happy to see an iPad version. But finally, i never used it. I find the controls awkward. click,select,click... So when i saw the upgrade i went right in but what a disappointment when i realize the basic controls did not work for me. Whatever i do, i m unable to fill a square with any color at all. I select a color, i click on a cell whit the finger, the stylus with hope, i release, nothing happens at all. i tried every thing and many times. i have to go back to the two other options that works but that i dont like. i will still wait for the next update!

solange1966 about iGridd, v1.6.0