Why are you sure that it is not a problem of IE?  Have you tried Firefox?  Have you tried Chrome? http://www.google.com/chrome  Are you using the latest version of Firefox?  What is your OS?

如有瀏覽問題, 請告訴我們及檢查你所用的電腦是 Most updated?

1. 作業系統
2.  瀏覽器 (我們不建議用Internet Explorer, 請用最新版本的 Firefox : http://www.moztw.org/ )
3.  你有安裝防毒軟件及Internet Security 軟件嗎?  沒有請安裝!

Please don't use proxy!!!

Someone tried this and said it works:

我試過HKSPACE用電腦，當我LOGIN無問題，但我一禁引用，就變左遊客，試左好多次，後尾我試過係登入時，有一行係永久、一個月...........瀏覽器進程 ... 揀好似係最尾一項既瀏覽器就可以回覆到，都冇再跳返去遊客個畫面，你睇下用呢個方法得唔得？

Though I suggest you choose forever if your computer is safe.

those who complain might be using proxy and mostly they are not from HK.  Try to check your proxy settings.