Custom Mail sound

[barebackbadger8]

hi
just got me a 13" MBP 2010 (Cheap i may add) anyway having no problems so far.....well apart from one

i remember on my old white macbook/mini i could change the sound that Mail made when i received a new email.
well i have changed the sound, added my futurama bender wav, also as an mp3 but when i get an email its silent and no sound is made!
as soon as i change it to the default mail sound, it makes a noise!

How do i get it to make the noise i want it to?

EDIT: i have highlighted a couple of items to delete, so i highlight them and press the delete button. but when i do it plays that futurama bender mp3?
what have i done wrong?

 

[TreoRenegade]

For reasons completely beyond my comprehension, I had the same problem. Somewhere along the line, I changed the filename so there would be no spaces. No problems thereafter. Go figure.

 

[barebackbadger8]

my sound name doesnt have a space in it though!
whats weird though, if i go to system preferences, sounds and highlight the sound. when i press delete it make that noise
ok sorted the press delete noise lol i didnt know the sound in preferences were for alerts, so ive sorted that!
just want my own mac mail