Val--that number you posted is like a telephone number for computers to talk to each other over the internet. It's called an IP number (Internet protocol number). The last 4 numbers after the colon is the port number--think of it as like a channel on a TV.

The reason you are getting an error message with DC is probably because all your upload spots are full, so LimeWire's error message is letting you know that the host is "unavailable"

In other words, wait until there are no uploads before you try the Direct Connect again.

Cheers--and best wishes to Grandma's caregiver.