Linda,
How very strange. I was on the Promaga site only a few days ago and everything seemed ok. Just tried it now and I didn't get on anything.
If you need to get to the Vista Hermosa development, try this link: www.vistahermosa-homes.com/
From everything I've read from the internet up to this point I suspect that Promaga are probably one of the better developers. They are still developers though, so there will occasionally be problems. The promagacowboys website is obviously been created by a disgruntled IT whiz
I'll try accessing the main Promaga site from the above link.
Regards
John