You do not specify the platform, OS version, FMP version...
It could be a Font problem, that you can print from other applications, tends to rule this out.
It could be a Font Cache problem, but again unlikely.
It could be a FMP version conflict with an OLD font version.
To test, make a new database and set the characters to test your font.
Make a new Notepad or word file and set to test the same.
Note the Symbol Font Version and Date and all of the above versions and post the results.
Windows XP SP3 and Windows 7 (neither work)
Server is Windows 2003