unable to get all the facebook comment

Hi all,

I had a facebook post which had 3214 comment.

Below is my code.

Post p = facebook.feedOperations().getPost("XXXX_XXXX");
System.out.println("p:" + p.getCommentCount());
PagingParameters pp = new PagingParameters(p.getCommentCount(),null,null,nul l);
PagedList<Comment> comment = facebook.commentOperations().getComments(p.getId() ,pp);
System.out.println("commentp:" + comment.size());

The return result is
p: 3214
commentp: 951

Is there anyway I can get all the 3214 comment?

Thanks for the help