ugcsearch not working for custom property for a blog post

Hi All,

i have added a custom field to Journal component, and the property is added to UGC node,

i have written an API to search UGC nodes for a property using ugcsearch.

UgcSearch ugcSearch = resourceResolver.adaptTo(UgcSearch.class);

UgcFilter filter= new UgcFilter();

SetConstraint constraint=  new SetConstraint("testId", value); value="sample text here"

filter.addConstraint(constraint);

But result is zero, it's can't lookup custom properties in UGC node.

any one have Idea on communities how to search custom field,

Thanks

Raj