bill - 8:01 am on Sep 21, 2011 (gmt 0)
There is no TLS 1.2 box in IE9. There is only TLS 1.0 box.
My office workstation only has the TLS 1.0 option as well, but at home IE9 has TLS 1.1 & TLS 1.2 options as well. You may want to check with your system administrator about that.
However, checking TLS 1.1 & TLS 1.2 in IE has been known to make certain sites unreachable...