Wolfson sound card working fine when I test, but not with pocketsphinx

I have tested recording and playback with my wolfson audio card, and both work fine. The problem is, when I try to use pocketsphinx with the card, it gives this error:

"Failed to set PCM device to mono: Invalid argument

FATAL: "continuous.c", line 239: Failed to open audio device"

It may problem with the .asoundrc or another hidden config file...

I found this .asoundrc file on the internet that supposedly works with the wolfson:

1. ####################################################################### 
2. # 
3. # Use libsamplerate instead of internal resampler. 
4. # You might have to: sudo apt-get install libasound2-plugins 
5. # Or just comment out the next line if the internal one is good enough for your needs. 
6. defaults.pcm.rate_converter "samplerate" 
7.  
8. ###################################################################### 
9. # 
10. # Wolfson Audio Card for Raspberry Pi 
11. # 
12. pcm.wolfson_pi_soundcard { 
13.   type hw 
14.   card sndrpiwsp 
15.   device 0 
16. } 
17. # Create a Master volume control 
18. pcm.softvol { 
19.   type softvol 
20.   slave { 
21.   pcm "pduplex" 
22.   } 
23.   control { 
24.   name "Master" 
25.   card 0 
26.   } 
27. } 
28.  
29. pcm.!default { 
30.   type asym 
31.   playback.pcm "plug:softvol" 
32.   capture.pcm "pduplex" 
33. } 
34.  
35. ##################################################################### 
36. # 
37. # Mixing and resampling goodness :-) 
38. # 
39. # Several clients can record and play back simultaneously. 
40. # The dmix and dsnoop plugins operate at 48kHz by default, i.e. the sound card will be kept at 48kHz at all times. 
41. # All playback streams are converted to 2 channels/48kHz/16bit. 
42. # All recording streams are converted from the card's 2 channels/48kHz/16bit 
43. # to the requested number of channels, sample rate and bit depth. 
44.  
45. # We define one pcm device called "playmixer" for playback. 
46. pcm.playmixer { 
47.   ipc_key 140324 # Any number will do, as long as it's unique in the system. 
48.   ipc_key_add_uid true 
49.   type dmix 
50.   slave.pcm "wolfson_pi_soundcard" 
51. } 
52.  
53. # Define another one called "recmixer" for capture. 
54. # The sound card will run at 48kHz and input is resampled to the requested rate. 
55. pcm.recmixer { 
56.   ipc_key 140325 
57.   ipc_key_add_uid true 
58.   type dsnoop 
59.   slave.pcm "wolfson_pi_soundcard" 
60. } 
61.  
62. # Define a duplex device, with both in- and outputs. 
63. pcm.duplex { 
64.   type asym 
65.   playback.pcm "playmixer" 
66.   capture.pcm "recmixer" 
67. } 
68.  
69. # Add a "plug" plugin for the above "duplex" device. 
70. # This is where all the converting takes place. 
71. # Sample rate, number of channels, bit depth. 
72. # By the way, who thought that "plug" was a good name for a plugin? 
73. # 
74. # Use this device for all your playback and recording resampling needs. 
75. pcm.pduplex { 
76.   type plug 
77.   slave.pcm "duplex" 
78. } 
79.  
80. # A ctl device to keep xmms happy 
81. ctl.pduplex { 
82.   type hw 
83.   card 0 
84. } 
85.  
86. # A DSP to keep the alsa-oss layer happy: 
87. pcm.dsp0 { 
88.   type plug 
89.   slave.pcm "duplex" 
90. } 
91.  
92. ctl.mixer0 { 
93.   type hw 
94.   card 0 
95. } 

Why is the wolfson not working with pocketsphinx when it worked when I recorded .wav files?