LMAO Starman,
I'd say combined with lack of experience in using neghits and the sheer unluckiness of the girl you used it on - made things difficult.
Use neg hits exclusively and when you need to break the so-called "b!tch shield" - when she is coming across as a little arrogant towards you or has somewhat of an attitude problem, thinking she is the sh!t. It's because most guys kiss their asses. She thinks she is superior in some way. In most of these situations, such women are HBs.
Nevertheless, LOOK AT HER ATTITUDE...not solely their looks. She could be good-looking - and have low self esteem, or average looking and have her shield enabled (though quite rare in my experience). Also, it's the way you come across that is just as important as what you say..
E.G. One HB I neg hitted. A little arrogant. After speaking to her, I said in a jokingish way.. "oh what beautiful hair, what beautiful eyes, and what big feet you have!" (was wearing sandals). She couldn't stop laughing and even went bright red (underneath her tan). She wanted to do something, but I told her I was busy. haha.
Typically I call it a "sting in the tail". That's how I use them. It's to say, "I will not kiss your ass, you're not the sh!t you think you are". But it's not an insult per se. Practice it some more, it is a good weapon in the DJ arsenal, when properly administered in the right situation.
I also made one bordering on an insult - deliberately, just to see the reaction. A test. She was also very good looking, a little arrogant, and a bit on the skinny side. Nevertheless guys kissed her ass - and she KNEW she was great looking. I was fasting one day over Easter ... and she kinda mocked it, so I joked, "Of course, you do not need to - it looks at though you've been fasting for 20 years". She was a bit stunned but wanted a coffee with me later. Note the latter was prolly an insult..but it did the job - it increased her interest. I'm trying to define the borders of neg hitting...i.e. how far you can go - but I discover it depends on the girl you use it on.
Sir_Chancelot wrote a good neg hitting post a while back, so did SexPDX, you ought to read them. Run a search.