this may not be the problem , but just a thought........
are they regular letter type fonts or are they "dingbats"(pictures/characters) ??
sometimes those have certain letters that have a character and some letters do not have anything ......sometimes you have to use all caps and sometimes all lowercase letters to get the characters....it varys
if they are the "dingbats".....and if you remember which ones you installed...you can go back to the website and find them again, click on the name of the font , which will take you to a page that shows each character in a box with the letter you need to type to get that character...here is one for an example...the capital or upper case letters will just print the boxes...the lower case letters print the characters.http://www.dafont.com/easter-bunny.font
also sometmies the dingbats will not work in grahpics programs but will work in a word document ...so if you are trying to use it in WC software, it may or may not work there.....I have a few that will and a few that woont ....and none of them ever worked in my graphics program......just play around and check it out I guess.