New Post: SPFilterDropdown not working with content type

Hi,
I am using version 0.7.2, and I have the similar issue as describe in this post.
I am using SPFilterDropdown() but as soon as items number is more than 20, filter does not work any more.

Code used below:

$().SPServices.SPFilterDropdown({
relationshipList: "TestList",
relationshipListColumn: "ItemName",
columnName: "ItemName",
CAMLQuery: "<Eq><FieldRef Name='Active'/><Value Type='Boolean'>1</Value></Eq>",
completefunc: null,
debug: true
});

Can you please advise what I am doing wrong?
Thank you in advance for you help.