#font-face doesn't work on some computers - html

Question

I'm using #font-face in my project for loading a specific webfont ("Amsi Pro"). The main problem is that it works on most of the computers I tested, but not on all (On those where it didn't work other websites with #font-face still worked).
Is there anything I've missed, or any server settings to set that will give me full support?
Some information of a PC where #font-face doesn't work:
whatsmybrowser.org/b/Q2TJ80F
Live Preview:
christlicher-gesundheitskongress.de
CSS:
#font-face {
font-family: 'AmsiPro';
font-weight: 400;
src: url('../webfonts/2E508B_0_0.eot');
src: url('../webfonts/2E508B_0_0.eot?#iefix') format('embedded-opentype'),
url('../webfonts/2E508B_0_0.woff2') format('woff2'),
url('../webfonts/2E508B_0_0.woff') format('woff'),
url('../webfonts/2E508B_0_0.ttf') format('truetype');
}
#font-face {
font-family: 'AmsiPro';
font-weight: 600;
src: url('../webfonts/2E508B_1_0.eot');
src: url('../webfonts/2E508B_1_0.eot?#iefix') format('embedded-opentype'),
url('../webfonts/2E508B_1_0.woff2') format('woff2'),
url('../webfonts/2E508B_1_0.woff') format('woff'),
url('../webfonts/2E508B_1_0.ttf') format('truetype');
}
html,body {
font-family: 'AmsiPro', Helvetica, sans-serif;
}

Answer 1

Even though it seems that Firefox 38 should support #font-face, there may be a partial use issue. Try using an app like Font-Squirrel to develop an SVG of your font and then reorder your #font-face like so:
#font-face {
font-family: 'MyWebFont';
src: url('webfont.eot'); /* IE9 Compat Modes */
src: url('webfont.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
url('webfont.woff2') format('woff2'), /* Super Modern Browsers */
url('webfont.woff') format('woff'), /* Pretty Modern Browsers */
url('webfont.ttf') format('truetype'), /* Safari, Android, iOS */
url('webfont.svg#svgFontName') format('svg'); /* Legacy iOS */
}
Per this source, it should maximize the amount of support your font has.
Hope this helped!