Can't log in thro Firefox but can in IE...any ideas why?

[OlderNotWiser]

That is about it! Im not aware of anything having changed but as of today I can only log in with internet explorer. Anyone know why this might be? TIA.

Anyone...? Tis driving me mad!

could it be something to do with your firewall? have you changed the setttings?
or have you inadvertently changed something else in your configuration? these things are SOOOOO annoying

Have not changed anything as far as I know. But OH has just checked and Firefox is fine for him too...damn! Its my PC!