I get the login page, and I click log on - it says "Please wait while logging on to the server" for a while and then "Connection problems. Check your network settings or please try again later."

It was working fine yesterday - anything going on?

Hey locutas and welcome to the forum :)

Firstly I would recommend that you clear your browser cache. If that doesn't work then you could try switching Internet browsers.
Those that other people recommend are IE, Firefox, Chrome or Opera, in each case the latest versions would work the best.

I'm no computer techie, but if those don't work I'm sure someone else here will be able to help further :)
If not, you could always ask Feedback for a help with a technical issue at info@isketch.net.

It is well worth checking out the following section of the help pages before contacting feedback. Scroll to the very bottom and there is a lot of information there for users unable to connect.

http://www.isketch.net/instructions/help.shtml