Dear Sathya,
"installed the font in the server" means that you installed it via the ServerManager Server/properties/fonts?
If so, do you use the name you defined during the install within the "font-family" within the pdf channel?
If so again, is it a (standard) true type font? If not, just test with a standard true type font, if that is working. If that works, the font you are using is probably not compatible with the fop version you are using.
Best regards
Holger