Hello Guys

My level 62 holy priest finally got duel - specc last night (Holy/Shadow) but the first time of DPSing a dungeon with shadow my damage was only 250 compared to everyone elses 500-600.
So, anyone know why my damage is so low?
Heres a bit of background info -
- Ive healed up to level 62 and have been what ive thought quite good seeing as there was not many wipes :P
- I use the same gear to heal and DPS however i think that doesnt matter because they both need intellect spirit and spell crit?
Thanks for reading, it would be really great if you can give me some ideas
Catherine