Oh, it doesn't work... :°( Yet everyone say it's so much easy!

Hi Rose

Americans use a colon after the initial greeting in a letter. In British English a comma or no punctuation at all is customary. Neither style uses a full-stop (or period as American's call it). If you use a comma after the greeting then you should use one after the ending too e.g. "Regards,". If you don't use a comma, omit it from the ending too.

I hope my email finds you well.

There is nothing syntactically wrong with this but how is an email ever going to find anything? I'd suggest an alternative, more direct courtesy instead. For example: "I hope you are well.".
I just set the FTP parameters on Filezilla and they work correctly work! There's just a
little issue to resolve: there are many files named "index.htlm", one each for
different paths.
I tryed tried to open one of them but the only thing I can displayed in my browser
is the notice "NEXT" on a white background. Would it
be better if you send to me a .txt or .pdf file instead?
I'm at your disposal to record a sample to fit your needs and receiving your feedback so to accomplish your specific requests.

"I'm at your disposal …" is a very old-fashioned phrase and seems over-courteous these days. I'm also not really sure what you mean by this sentence either. If you want to know if Rose would like you to record a sample then say so: "Would you like me to record a sample to help you describe what you are looking for?" or "I'd be happy to record a sample of your choosing. Any feedback you provide on it would help me to better respond to future requests.".  

Regards

Oh, it doesn't work... :°( Yet everyone say it's so much easy!

Oh, it doesn't work… :°( Yet everyone says it's so easy!