If i use basic waveforms or a pad and pan one left, one right and one middle, detune the panned ones 5-25 cents, it sounds not good anymore and chords sound really bad, why is this not working??? I thought to get a wide sound....
I use kontakt

There are one anti-aliasing algorithm for realtime processing and one for rendering. The one for realtime processing is usually worse to be easy on cpu.

Since you say "not anymore" I guess you used this a lot before.

I would try and render and see if it improves. Upgrade or similar might set default to something else.

There are usually settings you can choose for each mode of processing. I don't know details since I'm not at my daw right now.

The post above, is that really related to the OP question? Makes no sense to me...
With too much detuning you lose definition of the basic frequency. The ear cannot track it anymore.

And you create extra frequency tension. A perfect fifth and a fifth in equal temperament tuning differ only 2 cents (one cent is 1/100th of a semitone) but on a major third the difference is 14 cents. Add an extra 25 cents and you get frequencies 39 cents apart. And that won't sound good.

Interesting explanation. I never had success doing this kind of "fake chorus" effect.

Another issue might be that the pad sound is already detuned that way in the original patch, and doing it again just muddies the pitch water further (as bertkoor mentions) and starts causing random phasing problems as all that stuff beats against each other.

I've found that simpler sounds benefit most from this kind of panning and detuning, and the more complex the waveform, the less impressive the results are.

For widening, try using a mid/side eq or compressor, selecting the center and lowering it til you get a nice gap in the center. Other tricks are using a 12-20 ms stereo delay with very little of the original signal, or panning one track hard left and the other hard right and delaying one side 10-15ms.

Adding some top end eq on the delayed side will help higher frequencies "pop" out based on the notes played, and give you some nice side to side animation without worrying about pitch artifacts.

KVR/eSoundz: Xenobt

Try the Free Superfake.

Superfake is more than a chorus. It delivers six detuned voices, which can be spread in the stereo field.

http://music.service-1.de/html/superfake_wavedoubler_wok_vst .html

if you detune one of the panned sounds 25 cents below and the other one above the main pitch, you really can't get harmonically sounding chords, as each note is detuned a 1/4 of a tone apart. If that's what you're asking. The question is quite difficult to understand, please reformulate heh.

I'm sorry about that - I tried so hard.