Hi,
Sorry for not noticing your call for help before.
I have no real idea about what might happen - are you using the forum from your company office (=possibly behind a strong firewall or proxy), or at home with a standard, basic connexion?
Anyway, it's only useful to use httpS during login, while entering your password, so it can't be stolen; after you're connected, you can use http only, this creates no security issue.
DM