Active Directory search

I am doing a directory search against a group with 1092 members. My code below only gets 1000 users. (I have a forest of domains)

DirectoryEntry root = new DirectoryEntry("GC://dc=me,dc=com");
DirectorySearcher searcher = new DirectorySearcher(root);
searcher.ReferralChasing = ReferralChasingOption.All;
searcher.Filter = "(&(objectClass=user)(memberOf=myGroup))";

What am I doing wrong?