BX Trigger Upgrade?

Got the kit installed today, trigger feels much better! However, the trigger will not reset when I hold it back. If I let off, the hammer will set, but not if I continue to hold the trigger after it breaks. Any ideas what I’ve done wrong?
 
I think I remember that happening with my Kidd trigger but once in the rifle it functioned perfectly normal.

Did you replace any springs? Trigger return spring might be weak? Is it a new trigger or a used one that you put the kit in?