rerun adobe gamma from the control panel.
If Adobe Gamma is a little confusing, the following should help.
Adobe's Page on using AG <http://www.adobe.com/support/techguides/photoshop/cms2/gamma.html>
Ian Lyons' Most excellent site for screen and print matching (among other things) <http://www.computer-darkroom.com/ps7-colour/ps7_1.htm>