I had a similar issue and got a trustworthy friend to login to my account and move my character.
I believe it has something to do with a combination of ISP's, Router setup and just general quality of your internet as another friend who is in America was getting a rate of R3400 in the same zone yet not timing out / getting stuck in a loading screen - where about R2500ish is when it starts to get really slow, clippy and laggy for me.
Being in Australia - our internet services are somewhat rubbish to say the least. Another friend of mine had issues and she is lives in New Zealand, which also has a very average service.
I believe there is a threshold in which your ISP / Router / Computer can handle and when it's trying to download all that data in one hit - it get's timed out. Hence you are getting the connection error message.
For those of us who are having these issues (I by no means am an internet expert) believe it would be wise to stay out of congested areas such as Port Jeuno and set your HP to your home nation for the time being til there is a better workaround. Well that's at least what I am doing.