Voice XML not able to capture DTMF

Hi,
I wrote up a basic vxml, its not capturing the dtmf input. Can someone please let me know is there anything am doing the wrong way?
main.vxml:
"""

"""
grammar.vxml:
"""


0123456789*#

"""
Logs:
2013.07.14 07:34:06:013 CDT | Info | vxmlfe
{main.vxml-6007008001-2013.07.14-07.34.06-100} [Resource Loader] "file:///export/home/bwadmin/activator/main.vxml" : Resource loading finished.
2013.07.14 07:34:06:014 CDT | Info | vxmlfe
{main.vxml-6007008001-2013.07.14-07.34.06-100} [Resource Loader] "file:///export/home/bwadmin/activator/grammar.xml" : Resource loading finished.
2013.07.14 07:34:06:014 CDT | Info | vxmlfe
{main.vxml-6007008001-2013.07.14-07.34.06-100} [curl stream] "http://shriram:AnpiDesign11@fabric01ram01.anpisolutions.net/live/static/one_two_star.wav" : Data to submit: no
Data encoding:
Submit method:
2013.07.14 07:34:06:809 CDT | Info | confbe
[pid:27794] RTP: ssrc=7B66B6F0 Accepting RTP stream from 172.31.17.105:23892
2013.07.14 07:34:06:867 CDT | Info | ivrbe
[pid:27798] RTP: ssrc=D97C99E0 Accepting RTP stream from 127.0.0.1:10910
2013.07.14 07:34:09:301 CDT | Info | confbe
[pid:27794] RTP: ssrc=1B170822 Accepting RTP stream from 127.0.0.1:10912
2013.07.14 07:34:09:828 CDT | Info | confbe
[pid:27794] RTP: ssrc=(D97C99E0) RTCP Receiver Info: totallost=0 fractionlost=0 maxSeqNum=59376 jitter=1
2013.07.14 07:34:13:008 CDT | Info | ivrbe
[pid:27798] RTP: ssrc=(1B170822) RTCP Receiver Info: totallost=0 fractionlost=0 maxSeqNum=3800 jitter=4.062
2013.07.14 07:34:13:867 CDT | Info | confbe
[pid:27794] RTP: ssrc=(D97C99E0) RTCP Receiver Info: totallost=0 fractionlost=0 maxSeqNum=59631 jitter=0.062
2013.07.14 07:34:18:008 CDT | Info | ivrbe
[pid:27798] RTP: ssrc=(1B170822) RTCP Receiver Info: totallost=0 fractionlost=0 maxSeqNum=3865 jitter=2
2013.07.14 07:34:19:107 CDT | Info | vxmlfe
{main.vxml-6007008001-2013.07.14-07.34.06-100} [BroadWorks VoiceXML Session] "N/A" : Interpretation completed, disconnecting...
2013.07.14 07:34:19:107 CDT | Info | vxmlfe
{main.vxml-6007008001-2013.07.14-07.34.06-100} [BroadWorks VoiceXML Session] "N/A" : releasing session 100
2013.07.14 07:34:19:108 CDT | Info | confbe
[pid:27794] RTP: CLOSE ssrc=7B66B6F0 receiver stats: packet expected=615 received=615 jitter=0.253281 resyncs=0 outoforder=0 badpayload=0 badssrc=0 rtcp=0 plc=0
2013.07.14 07:34:19:108 CDT | Info | confbe
[pid:27794] RTP: CLOSE ssrc=(170ABFB3) sender stats: packets sent=242 bytes sent=38720 rtcp=0 totallost=0 fractionlost=0
2013.07.14 07:34:19:114 CDT | Warn | msfe
ProgrammableMixer::deregisterHandle Orphaned handle 0
2013.07.14 07:34:19:112 CDT | Info | ivrbe
[pid:27798] RTP: CLOSE ssrc=D97C99E0 receiver stats: packet expected=611 received=611 jitter=0.0776691 resyncs=0 outoforder=0 badpayload=0 badssrc=0 rtcp=3 plc=0
2013.07.14 07:34:19:112 CDT | Info | ivrbe
[pid:27798] RTP: CLOSE ssrc=(1B170822) sender stats: packets sent=242 bytes sent=154880 rtcp=2 totallost=0 fractionlost=0
2013.07.14 07:34:19:112 CDT | Info | confbe
[pid:27794] RTP: CLOSE ssrc=1B170822 receiver stats: packet expected=242 received=242 jitter=1.97992 resyncs=0 outoforder=0 badpayload=0 badssrc=0 rtcp=1 plc=0
2013.07.14 07:34:19:112 CDT | Info | confbe
[pid:27794] RTP: CLOSE ssrc=(D97C99E0) sender stats: packets sent=612 bytes sent=391680 rtcp=2 totallost=0 fractionlost=0
2013.07.14 07:34:19:129 CDT | Info | msfe
SipUdpSocket::sendSipMessage sending message to 172.31.110.201 port 5060
BYE sip:172.31.110.201:5060 SIP/2.0
Via: SIP/2.0/UDP 172.31.110.210:5060;branch=z9hG4bK-BroadWorks-MS-1083249438
From: "user activator" ;tag=1032949694
To: "shriram ramamurthy" ;tag=1608250081-1373805245811-
Call-ID: BW073405811140713-78056300@172.31.110.201
CSeq: 1225090361 BYE
Max-Forwards: 70
Content-Length: 0
2013.07.14 07:34:19:134 CDT | Info | msfe
SipUserAgent received message from 172.31.110.201
SIP/2.0 200 OK
Via:SIP/2.0/UDP 172.31.110.210:5060;branch=z9hG4bK-BroadWorks-MS-1083249438
From:"user activator";tag=1032949694
To:"shriram ramamurthy";tag=1608250081-1373805245811-
Call-ID:BW073405811140713-78056300@172.31.110.201
CSeq:1225090361 BYE
Content-Length:0