That's what I thought too. I figured if there's something about me that might turn people off online, it would have the same affect offline.
No! Not a good way to go about it, man. Offline you get to present your whole self, online you're just an image. Also, most girls will hesitate online because they'll be wondering the following:
-Are you real?
-Are you normal and not a freak?
-How embarrassing and/or awkward will it be to meet the first time?
You have to fulfill that whole criteria for it to work. Lots of hoops to jump through, especially with the good looking girls who are willing to play the field since they get messaged 50 times a day. Online dating is not a good "market" for us guys, there are too many of us and the majority of us are boring and/or crazy (my lady-friend showed me the messages she received).
If you approach girls outside then you get rid of much of the pressure associated with online dating. Make sure you have your best pic in your profile, add a bunch of humor. Don't fill the lists out as is, everyone does it and its boring. If this works for you, keep it up. If you find that you're not getting replies still, start going out more. Leave the online profile up just in case some girl does message you, but go meet girls at social outings.
In fact, once my A-List runs out I'll be disabling my profile.
@Blasian Persuasion
It doesn't get any easier online in most cases. You need to figure out why it didn't work offline and make changes.