Why can't I open my own .wps files?

Ok, here’s the new crisis: I’m trying to navigate around Microsoft Works 9, so my only document option is .wps. I was doing a little test, and trying to send a .wps document to myself. i was able to attach and send just find, but Works wouldn’t allow my to open the attachments I jsut sent to myself.. I tried in excite, yahoo, and gmail. All to no avail.