Fire Mage rotation?

So when i first rolled this toon and went fire in the late 20s the rotation was pretty easy after 4.0. Pyro-fireblast-scorch-til-something-procs/or fireblast comes off cooldown. i could easily keep 2nd spot in recount, but now after cata's release im seeing a drop in my Damage. Now im lucky to not be last in an instance. Any help?

Leveling Rotation: Pyro-fireblast-scorch-til-something-procs/or fireblast comes off cooldown.

Instance Rotation: Fireblast-Scorch til something procs/or fireblast comes off cooldown.

Tl;Dr
I suck at mage rotation. QQ.QQ Helpz meh.
I will tell you when you reach 85
Agree with Psyonic...worry about lvling first. I know I'm only lvl 69 myself but eh. I've just recently started in on NR dungeons (I random all day in a mad rush to lvl) and I consistantly lead or at the least run 2nd in DPS because at these lower lvls the runs go so fast and with a decent tank I don't have to worry about doing any cc or stealing agro so I can just sit back and aoe the bajebus outta everything. But being only lvl 69 my main focus is lvling, I'll worry about everything else when I ding 85. There are plenty of threads out there on fire rotation and surprise not everyone agrees on some of the finer pts such as should you spam fireball or frostfire bolt with the glyph should I weave in scorch or not etc. But again your focus should be level level level then worry about everything else.
Wait till you hit 85...you have alot of time to experiment on your own for now
I agree with those above, don't worry about "rotations" yet. Get a feel for the spells, what they do, how much aggro they draw, ect. Also play with "all" of your spells, i've met people who play mage that have no idea what "sheep" means because all they care about are l33t dps. Knowing what to do when with what is much better than knowing 1-1-2-1-1 or whatever.