A fairly easy way to help you with your sentences, is to start a new line with each new sentence. While technically this still isn't proper punctuation, it will still make your posts easier to read.
Using your original post as an example
Since upgrade to 3.21 on my Vista Ultimate 64bit i can't activate my copy of mIRC in past it worked with 6.31 but i don't know why now i can't unlock it anymore everytime i copy & paste in my name and my passphrase under "Help" -> "Register" it says "Your registration does not appear to be valid. Please ensure that you are entering it using the correct capitalization and spacing." yeah and i copy&pasted it once i typed it inside manually to to be sure but no way i cant unlock it !!! i've paid for it and i want to use it
becomes
Since upgrade to 3.21 on my Vista Ultimate 64bit i can't activate my copy of mIRC
in past it worked with 6.31 but i don't know why now i can't unlock it anymore
everytime i copy & paste in my name and my passphrase under "Help" -> "Register" it says "Your registration does not appear to be valid. Please ensure that you are entering it using the correct capitalization and spacing."
yeah and i copy&pasted it once i typed it inside manually to to be sure but no way i cant unlock it !!!
i've paid for it and i want to use it