I don't have OD+ but I use DTX and OB on occasion.
The enable mcp notification area support is (from what I understand) what causes the systray info to show in the OD+,OB,DTX.
Once in a while in DTX, I have had to go in to the created systray and change the icon offset to get the icons to show. I don't know if that applies to OD+.
At Wincustomize, Corky_O has a site with lots of tutorials and a bunch of those deal with OD+. You want to wander over to his site and peruse them. The answer could be there. WC is blocked by my employer, so I can't give a link.