Act_as_ferret returned result is 10

I am using
@query = Ferret::Search::PrefixQuery.new(“name”, params[:q],:max_terms
=> 1000)

to find the result from the Users table having their name start with the
given parameter.

It only gives me 10 results ever after giving parameter max_terms =>
1000

I dont know what the error is can you please suggest me something.

Thank You in Advance.