Hi Ian,
I have tryed it here if you do whats below should work
in Inventoria
under web managmet
Local access
set mode to "computer Host" and note the port mine was "1097"
then set the code for inventoria sysnc usnder other-advanced options also this code will be needed for express accounts
now go into express account
go to other- inventoria sysnc options
put in the code you set in inventoria for sysnc options
for address or IP address put in the name which was given beside "computer host" in inventoria
put in the port number noted from invertoria then click retreive locations and should happen quick and the set the location then update now and you should be done.
let me know how you get on. I will try and do out it better if you still don't get it to work.