Hi Val,
Do you have your PC at the warehouse turned on with EI running and the web access turned on? When you click on the web access icon along the top of the main screen (on my version), it will ask you if you want to turn on the web access. If it's not on, nobody else can access it.
I have trouble occasionally accessing it from home. You have to watch the address. It tends to change unexpectedly. I have an assistant that uses EI from the local web access (the main is on my computer). A common question I hear is, Okay, what number are we today?
The last time I tried accessing it from home it didn't work. I haven't had a chance to explore why this time. You might also make sure your PC didn't go to sleep. That seems to affect it sometimes.
Hope this helps!
Teri