I had a lot of trouble with fonts in C2. The best solution I found was include the font (in .svg, .woff, .ttf formats) and a .css file to the project. At fontsquirrel.com there is an online service that can provide everything to you, just upload your font there. After upload your project at your dropbox folder, copy the .css file public url and paste it at the proper field in the C2's set web font function.