Loosing line formatting when changing styles in Org Chart

[Kevin243]

I am using Office 2003 with SP2 and have been doing some of the
exercises in a MS Office Specialist book.

Exercise in Word
Create an Organisational Chart. Add some names.Change to 'Bevelled'
style. Select all connecting lines and then use 'Format Autoshape' to
change colour to red and add arrowheads.

The option to change the line and colour is grayed out in the selection
box.
If I revert back to the default style and try, I can change the colour
and add arrowheads but this change disappears on changing to Bevelled
style.

Has anybody else come across this? Is a SP2 issue? Am I being stupid
and missing a step?

Any help appreciated.

Thanks

Kevin