Sara, you left out some important information, your website address.....
There are many ways to make a website on here...are you using the Wizard? Blue or Red?..
To add html, you would either, (depending on what you're using to build the site with), use 'Code Editor' or 'File Manager'....never in 'Visual Editor'....
Post back with details so people, who want to help you, will have something to 'work' with...
You need to give us more information or we won't be able to help. You say "the file manager doesn't work". Exactly what doesn't work. Are you trying to edit from the File Manager or upload files? Are you working with a free site or paid hosting? Are you instead using the Website Wizard?
cosasdecronopios,
What doesn't work with FrontPage? FrontPage is usable with free or paid sites, although you can only use FrontPage extensions with Premiun hosted sites. But FrontPage creations must be uploaded, or published, through FrontPage's automated FTP connection. Your FTP information is available in your account manager under "manage hosting" --> "ftp access". I don't have FrontPage myself, but if your are dealing with a free web site you can see how to upload using other applications from my Using FTP help page.