Yes the icab error message is
Your browser's cookie functionality is turned off. Please turn it on.
and the IE5:
Gmail requires ActiveX controls to be enabled
Your browser seems to be Internet Explorer, and ActiveX seems to be disabled. Gmail requires ActiveX to be enabled in order to operate.
To use Gmail, enable ActiveX controls in Internet Explorer. You can do this by going to the Tools menu, selecting Internet Options, Security tab, Internet zone, and either select the Default Level, or selecting Custom Level and scrolling down to "Run ActiveX controls and plug-ins" and selecting Enable.
After enabling ActiveX controls, try again.
PS It is enabled of course...