OK, so the problem is probably the AT identification string.
If someone can do the following with their phone, then I may be able to finish this.
***********************
1. Download ZTerm -
http://homepage.mac.com/dalverson/zterm/
2. Connect your phone via USB - make sure the phone is in the "Data Connection" or "Data Modem" USB mode (some phones offer a "Memory Card" mode). If you can't find the option on your phone, it is probably OK to proceed.
3. Open ZTerm
4. Select the USB modem port that corresponds to your phone from the modem dropdown list. If there is no dialog box with a dropdown list of serial ports, then select:
Settings -> Modem preferences
Once a serial port is selected, you should get a response in the terminal window that says:
ATE1 V1
OK
*Note: Be very careful using ZTerm, only use the following commands - I take no responsibility etc. etc.
*
4. Type the following:
AT+GMI
...and press "return" on your keyboard
The response should be something like:
+GMI: "Motorola CE, Copyright 2005"
5. Next type:
AT+GMM
The response varies from phone model to phone model.
6. Copy the entire output of your terminal window and paste it in this forum thread.
************
We'll see how it goes.
Sam