web service PrestaShop

[fabio77]

Goodmorning everyone,

I have a dialog problem with the web service of PrestaShop,

I created a utility in vb.net and I managed to read the products using the GET method, to remove the product using the DELETE method, but I can not carry the insert (POST) and update (PUT). Create an xml string to perform the insertion or update

but I always get error 400 server,

if any of you can help me.

thank you very much...