Sorry I originally wrote in Spanish ( Maybe it was because of frustration =( )
In English now...
I'm so sorry to tell you about none of two modules is working at all. =(
I used THREE completelly NEW SD Kingston cards I got from:
( http://www.ebay.es/itm/221194347559?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 )
Also a 1Gb Sandisk SD SanDisk from:
( http://www.ebay.es/itm/160983521327?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 )
On the TWO modules I got from:
( http://www.ebay.es/itm/150916490980?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 )
(v.1.5 powered 3.3v from Arduino Leonardo power output).
...and nothing on the speaker, not even a single click.
I think I'll move my project to a different device (maybe the one from SparkFun).
Current ones make me feel NO confidence on them at all.
NOTE:
The TWO modules, Kingston and Sandisk SDs are available to you for running tests, just let me know...
Ciao,
Rafa.