How to fix "503 Error: Service Temporarily Unavailable"?

[The Great ME!]

I haven't yet found anything on this despite various searches, but here's my problem.

I tried making a new Free-Forums site a couple weeks ago, but when I tried adding a theme in the Admin control panel, it said there was an error from "unauthorized access" even though I'm the admin. Tried another theme, same problem. Then I tried to access it, and got a blank page with only the text "503 Error: Service Temporarily Unavailable".

The Error shows up when I go to ALL Free-forums addresses/sites, not just the one. Other people on my forum get the same problem/message from their computers, but when I try to go to it through a different modem/wi-fi or device, the site works without a hitch.

I've done a full virus scan of my computer in safe mode, cleared the cache/history/cookies, and flushed the dns. Still doesn't work on my home internet, but works fine on other internet/wi-fi IP's.

Any idea/suggestions on how this can be fixed? I try to go to Free-forums' main page for support/help, but the main page is apparently blocked too.

((Note: I mean Free-forums, NOT Freeforums. The two are different websites/hosts))

[HemppyRLM]

hi The Great Me, here is where a computer repairman comes in to play. sure you are the administrater over that account but to do what you are wanting to do they have to have a tax number and this is why the computer repairman went to school to get so it is calling for his or hers computer tech license ran by the government. so call your internet provider and see if they can help you with this problem. trust me I am not pawning you off to your internet provider they might be willing to give you theirs license number. other wise the computer repairman has to do it for you if he is willing. good luck I hope I was helpful to you

[brooklyn]

You need to be talking with your hosts support