Master Volume Envelope Has Disappeared

Hi all!  I'm using Sonar 7 and occasionally my volume envelope in the track view dissapears.  When I right click in the master track area in the track pane and click on Envelopes/Show Envelopes it says I have the volume envelope, but it is nowhere in the track pane.  Any ideas what I am doing wrong? Thanks!

Oops, sorry, I just realized I posted this in the wrong Forum. Not sure how to do a screen shot in the forum. I saved it as a word file, but don't see anywhere I can attach a file. I wasn't able to paste it in this box. Any ideas on how to get a screen shot to work in here? I did figure out the problem. I went to the Envelope Tool and clicked on the arrow to the right and noticed it brought up a menu and the 1st thing it said was "Show All Envelopes". I clicked on that and then the Envelope that had disappeared reappeared. Not sure what I did to make it disappear. Below the "Show All Envelopes" is "Hide All Envelopes", but I have never used the Envelope Tool before, so still a bit of a mystery why it disappeared.

Thanks for the info! I feel so old school. I'll check out Photobucket and Imageshack.