Thank you for this informations!
How can i improve my website with this suggestions?
Sorry, I know you said you were in beta and I may come of a bit harsh, my suggestions are;-
Unblock your whois data, you are asking people to trust you with their assets, it is hard to trust someone that is deliberately trying to hide from you.
You also need to look at your web server, it is leaking potentially exploitable information ( have a look at D:\Documentos\vivar\THSISPAG\THSISPAG\BD\AcessaBD.cs for example ) and going to your IP shows a 404 page with a generic error.
The actual website looks good though, but with it leaking information like that, I don't dare to put any sort of personal information in to create an account.
And fix your PTR record, I know it is not essential, but things like that bug me and don't look professional at all, even for a beta site. You are asking people to trust you with their bitcoin's over and above someone that they are dealing with after all.