CTS is low while initializing modem - TAPI 3.0 VC++

Hello all,
I am encountering this strange problem.
I am using TAPI 3.0 and C++.
After some successive calls, modem strucks and the modem log shows the
following messages.
09-01-2005 21:11:09.109 - Opening Modem
09-01-2005 21:11:09.109 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:09.109 - Initializing modem.
09-01-2005 21:11:09.109 - CTS is low while initializing modem.
09-01-2005 21:11:09.125 - TSP(0000): Making Call
09-01-2005 21:11:09.125 - Send: ATZ<cr>
09-01-2005 21:11:11.125 - Timed out waiting for response from modem
09-01-2005 21:11:11.125 - The modem failed to respond to the initialization
command, Retrying one more time
09-01-2005 21:11:11.125 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:11.125 - CTS is low while initializing modem.
09-01-2005 21:11:11.125 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:11.140 - Send: ATZ<cr>
09-01-2005 21:11:13.140 - Timed out waiting for response from modem
09-01-2005 21:11:13.140 - The modem failed to respond to the initialization
command, Retrying one more time
09-01-2005 21:11:13.140 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:13.140 - CTS is low while initializing modem.
09-01-2005 21:11:13.140 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:13.156 - Send: ATZ<cr>
09-01-2005 21:11:15.156 - Timed out waiting for response from modem
09-01-2005 21:11:15.156 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:15.156 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:15.156 - Initializing modem.
09-01-2005 21:11:15.156 - CTS is low while initializing modem.
09-01-2005 21:11:15.156 - Send: ATZ<cr>
09-01-2005 21:11:17.156 - Timed out waiting for response from modem
09-01-2005 21:11:17.156 - The modem failed to respond to the initialization
command, Retrying one more time
09-01-2005 21:11:17.156 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:17.156 - CTS is low while initializing modem.
09-01-2005 21:11:17.156 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:17.171 - Send: ATZ<cr>
09-01-2005 21:11:19.171 - Timed out waiting for response from modem
09-01-2005 21:11:19.171 - The modem failed to respond to the initialization
command, Retrying one more time
09-01-2005 21:11:19.171 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:19.171 - CTS is low while initializing modem.
09-01-2005 21:11:19.171 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:19.187 - Send: ATZ<cr>
09-01-2005 21:11:21.187 - Timed out waiting for response from modem
09-01-2005 21:11:21.187 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:21.187 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:21.187 - Initializing modem.
09-01-2005 21:11:21.187 - CTS is low while initializing modem.
09-01-2005 21:11:21.187 - Send: ATZ<cr>
09-01-2005 21:11:23.187 - Timed out waiting for response from modem
09-01-2005 21:11:23.187 - The modem failed to respond to the initialization
command, Retrying one more time
09-01-2005 21:11:23.187 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:23.187 - CTS is low while initializing modem.
09-01-2005 21:11:23.187 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:23.203 - Send: ATZ<cr>
09-01-2005 21:11:25.203 - Timed out waiting for response from modem
09-01-2005 21:11:25.203 - The modem failed to respond to the initialization
command, Retrying one more time
09-01-2005 21:11:25.203 - 115200,8,N,1, ctsfl=1, rtsctl=2
09-01-2005 21:11:25.203 - CTS is low while initializing modem.
09-01-2005 21:11:25.203 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:25.218 - Send: ATZ<cr>
09-01-2005 21:11:27.218 - Timed out waiting for response from modem
09-01-2005 21:11:27.218 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
09-01-2005 21:11:27.218 - TSP Completing Async Operation(0x000103d6) Status
0x80000048
09-01-2005 21:11:27.218 - TSP(0000): LINEEVENT: LINE_CLOSE

Its an IVR software, and I do wavefile playback while the call is connected
to get user input.
The calls go out continiously one after another. After some calls (varying
from 10-15), the modem gets struck and all the call retries fail after that.
The modems strucks at OH bit, and goes to normal only when I restart modem.
Application restart doesn't help.
Once restarted, the calls go normally.

Modem details:
D-Link DFM 560ES data/vioce/fax modem
Driver details:
SmartSCM External V.90,K56Flex,Voice,Speakerphone
Driver date: 8/8/2000
Version: 3.0.0.0
Driver File details:
Modem.sys and RootMdm.sys
Provider - microsoft corporation
File Version - 5.1.2600.0 (xpclient.010817-1148)

Thanks in advance,
Madhu Kumar


.

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