i have a samsung finesse i have gone by the book but still no luck what i am trying to do is put a different ringtone to  some of my contacts but when i do it want change it says it is but it is not i can change the ringtones for the phone but it just want let me put a different one on my contacts any body can help me please thank you

Go into Contacts from the home screen. Tap the contact you want to change the ringtone for.
You should now be on the screen for that contact. Tap Edit. Scroll to the bottom, there is a pair
of notes and the entry should say "Default". Tap on there to bring up My Ringtones. Select
which ringtone you want for that contact. Tap Set. Tap Save. It should now say Contact Updated.
Now on the contact's screen you should see it's ringtone changed to the one you've selected.