Well, Vulcan, lets look at it. If it runs on my system, which is similar to yours, then there can be only 2 things that are causing it.
One, your connection could be poor.
Two, there is something in your setup. The program we are running is identical, so it must be something on your system, right?
Narrowing it down, what OS are you using, version number, etc. Running through a firewall? You notice something here? All the questions pertain to your system, not the program as written by the Rats.
As I stated above, if it runs on some systems and not others, then the logical conclusion is that it is the users own system not the software.