Woah.
Ok, I guess its time for work

haha.
No offence man, but you don't want to open with stuff like that. I guess some people do big up these strange openers, but this is particularly bad.
The subject?? Baaaad Idea. The best thing as a subject is a simple 'hey' or I would maybe even use just '.'. Hello Dork, even though 'Dork' can be used affectionately, is like a half-assed insult wen used straight off.
For the text; think this. If you were a girl and you got this...what the hell would you say? There is almost nothing for her to hook on...the best thing your gonna get is 'Haha' or the response the girl gave you.
You could keep this as a little flirting joke when you get into conversation, but this is a bad opener.
On online game, you don't have to neg straight off. I find people are never as scary as you think, and again
situational openers are the winning game. I know I big them up in almost every post, but especially online, they are the way to go.
Look at her profile. Look for the interesting stuff. Then, in that list of interesting things, cut out the words 'tits' 'ass' 'hot body' blah blah thats caught your eye. Depending on the girl, you'll either have a few more things or all the interesting things will be out the window lool. Read the profile, and see what has conversational value.
Always pick something wierd, rather than the normal, 'You live in xxx?'.
If its music: 'You like ****?! I thought everyone hated him/her/them'
If she's playing guitar; 'You play guitar?? You really don't seem like the rockstar kind of girl. How long you been playing...or are you just posing

?'
If her favourite film his bambi or some shit; 'Haha, simple question - Am I the only who as a kid watched bambi and cried my eyes out when his mother died?!'
Always sign your name.
You kinda get the idea; looking for interesting things on the profile, unusual, even better (stuff other guys wouldn't pick up on) and construct an enthusiastic, slightly teasting, but genuinly interested in her question'
You'll get a much higher success rate.
Hope that helps.
Riot.