Problem Download of a pdf as media

[Raffaele Fannis]

Hi all i'm new in the forum, i just had a problem with virtuemart, I had set all my products with pdf as media to let the user download the depliant, this solution always work and i can download this files as i want, but now it's happening that when I try to download this files the browser send me an error 429: to many requests, this problems happens with all browsers, how can I fix it?

Thanks for help