SBL (start before logon) : Can't get it to work

Question

I'm trying to get Start before logon working on a Cisco 1941. I've got it setup so it downloads the correct profile but when I test with a PC it doesn't work. It shows the server entry but doesn't even ask for a username and password and thus won't connect.
I've gone through the Cisco documentation and I'm sure I've done everything right but obviously not. Could someone check my config below and offer advice:
The only things I've changed for security is the IP details
Cisco 1941:
webvpn gateway gateway_1
ip address 8.8.8.8 port 443
http-redirect port 80
ssl trustpoint TP-self-signed-2717103300
inservice
webvpn install svc flash0:/webvpn/sslclient-win-1.1.4.176.pkg sequence 1
webvpn install svc flash0:/webvpn/anyconnect-win-3.0.10055-k9.pkg sequence 2
webvpn import svc profile newprofile flash:/profile1.xml
webvpn context customer123
secondary-color white
title-color #CCCC66
text-color black
ssl authenticate verify all
policy group policy_1
   functions svc-enabled
   svc address-pool "new" netmask 255.255.255.248
   svc module vpngina
   svc profile newprofile
   svc split dns "10.0.0.253"
   svc split include 10.10.10.0 255.255.255.248
   svc split include 10.0.0.0 255.255.255.0
   svc wins-server primary 10.0.0.253
default-group-policy policy_1
aaa authentication list ssl_vpn_xauth_ml_1
gateway gateway_1
max-users 6
inservice
end
The actual profile which get's downloaded:
<?xml version="1.0" encoding="UTF-8"?>
<AnyConnectProfile xmlns="http://schemas.xmlsoap.org/encoding/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://schemas.xmlsoap.org/encoding/
AnyConnectProfile.xsd">
<ClientInitialization>
<UseStartBeforeLogon UserControllable="false">true</UseStartBeforeLogon>
</ClientInitialization>
<ServerList>
  <HostEntry>
    <HostName>Cisco1941</HostName>
    <HostAddress>8.8.8.8</HostAddress>
  </HostEntry> </ServerList>
</AnyConnectProfile>
Thanks for any help.
Andrew

Answer 1

No ideas?
It all looks okay to me according to the Cisco configuration guides anyway. SBL still doesn't work however