wav files not playing on nano

i'm trying play sound files nano, nothing comes out of speakers except faint pop, , nothing.   here code:  

code: [select]

#include <tmrpcm.h>
#include <sd.h>

tmrpcm audio;

void setup() {
 serial.begin(9600);
 serial.print(f("\ninitializing sd card..."));
 if (!sd.begin(10)) {
   serial.println(f("failed!"));
   return;
 }
 serial.println("done.");

 audio.speakerpin = 9;
 audio.play("sound.wav");
}

void loop() {
 }


this breadboard looks like:


the speaker i'm using:
http://www.dx.com/p/50mm-3w-speaker-driver-unit-black-silver-118192#.u5yvmfldv8e

the sd card reader i'm using:
http://www.ebay.com/itm/1pcs-sd-card-module-slot-socket-reader-read-and-write-for-arduino-arm-mcu-is-/271423472886?pt=lh_defaultdomain_0&hash=item3f321984f6

ic i'm using:
http://www.taydaelectronics.com/cd4050-cd4050be-4050-buffers-line-drivers-hex-non-inverting-ic.html

tmrpcm library page:
https://github.com/tmrh20/tmrpcm/wiki

any ideas on how can troubleshoot problem is?  i following guy's tutorial:
http://maxoffsky.com/maxoffsky-blog/how-to-play-wav-audio-files-with-arduino-uno-and-microsd-card/
the serial monitor says card initialized properly, problem?

did circuit diagram there? wonder whether you're driving speaker correctly - i'd have expected see capacitor take out dc bias.

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