I'm guessing you're a WP tank and RttC gets detoggled every time you get mezzed?
There is nothing you can do to stop it. Its the new mez system. There is no more mez protection in PvP. Any form of mez protection gets turned into mez resistance now. I've seen a lot of WP tanks drop RttC from their build because of it.
EDIT: I forgot to add that any type of toggle that effects another player (rttc has a tohit debuff for example) will get turned off due to the mez system changes. Any toggle that doesn't effect other players stays toggled, but the effects of the power are suppressed until the duration of the mez is over (usually only a couple of seconds)
OK, thank you for the response. I was running my Ice though and fighting npc's in a zone is kinda of.... well stinks when you lose one of your forms of dps, but oh well! Here's to relearning 
Roll psi/em, GG.
Well I am stepping back into the game as a whole and noticed that in PvP zones my Tankers damage toggles get detoggled often and that it "seems" that my Tanks get mezzed as much as my Blasters. Is this just the way it is or can a Tanker do anything about this?
Thanks