"itsyousillybu" -- "It don't work" is perfectly good grammar -- it's just not quite standard English. Using non-standard English grammar gives no indication whatever of low intelligence. I know lots of people who have a very strong dialect but who are extremely bright, and more to the point, are good, sensible people.
On the other hand, being patronising about grammar might suggest certain character flaws -- not, I am sure, that this could possibly apply to you.
I do notice that your own name omits a vital apostrophe....
Katie -- a fuller explanation of how come it don't work might get you a more helpful answer.