If you have made 25 posts and cannot download the manuals then the chances are that you never confirmed your email address when you signed up.
When you sign up and give your correct email address then a welcome email will be sent to you which will have a link to confirm you email is correct.
This stops people spamming the site, etc.
If you don't confirm your email then you get stuck in a category which will not let you download the manuals no matter how many posts you have made.
If you can't find your email or gave the wrong email address when you signed up and you have over 25 posts than just send me an email with your username and I will fix this for you.
Cheers
Andy