O2 XDA II unlocking problems

[Chips]

I have an Xda II (on the UK O2 network with data only) with the following details:

ROM version: 1.66.00WWE
ROM Date: 02/20/04
Radio version: 1.10.00
Protocol version: 1337.18
ExtROM version: 1.66.209

I downloaded the tool to unlock the 02 Xda II directly to the Xda and ran the program. I got the message:

Start of rpair process...
Preparing modem...
Failed to send ATZ

As I downloaded the tool OK (and can browse the web etc) I guess the Internet connection is ok. I use GPRS.

Can anyone explain what has gone wrong?

I currently use Vodafone for my mobile phone and O2 for my Internet/email. I would like to use the Xda II for both on the Vodafone network.

Thanks for any advice.

Regards,
Chips

[cruisin-thru]

Did you try the other version of the xda2unlock that runs over usb, I have found that if one fails the other will often work.

[hissing_sidebands]

I got the same "failed to send ATZ" when I used the program which runs the setup from the PC.
I directly copied the xda_unlockv2.2.exe to the XDA using active sync (pasted it into the pocket PC my documents folder on the PC and ran active sync, then used file explorer from "programs" on the XDA2 to find it), then ran the unlock program.
It worked a treat!

From looking at other posts, these symptoms appear to be occurring on XDAs with "Ext ROM version 1.66.209"
My Device info:
Rom Version 1.66.00WWE
Rom 02/20/04
RAdio Version 1.10.00
Protocol Version 1.66.209

Hope this info helps someone else