Downloading powerpoint doc

[kasyaparushi kiran]

I am trying to download a powerpoint file.but the content type is throwing an exception.

please find the details

Caused by: java.lang.IllegalArgumentException:

renderResponse.setContentType("application/vnd.ms-powerpoint");

I have tried with application/ms-powerpoint,application/ppt,application/powerpoint

It is throwing illegalargument exception.

Please suggest a solution

Thanks,
K.Kiran Kumar