Are you running Firefox?

If not, install it and try that instead of IE.

If you are, try IE instead.

Some sites are set up to take advantage of the non-standard features of IE, and likewise - IE gets confused with some fairly standard stuff.

Have you got Javascript enabled?

It *could* be because you're behind a proxy server, but it's unlikeley - unless your proxy isn't set up to allow https (secure) connections.