Hi Alexander
I learnt a long time ago that if I post an answer that took me no more than 30 seconds to google, I nearly always get a message of thanks.
However if, as I've done before, I miss a night's sleep to research a reply (or go for a 100 mile drive to get an answer), I can almost guarantee that I'll not get any response.
Even the American guy who I met in London, to travel with on Eurostar so that I good give him a personal guided tour of Paris, never acknowledges my Christmas cards or the emails I've sent to him :-(
Oh well, c'est la vie!
Chris