Mixed voice problem

Hi !

I've been tryning for months to discover this mixed voice.. But  whatever i do its still in chest voice i can feel that in my throat.

I also tried with ASCEDING AND  DESCENDING  NO.. but its doesn't help so much, because i can t sustain more that D4#. After D4#(I CAN HIT BUT NOT SUSTAIN VERY WELL MORE THAN THAT) it becomes  hard and shouty if i go to hard.

Its  weird  because my lowest  and comfortable note is a A2# and  my highest and comfortable Is  a D5# in FALSETTO.

BUT  ABOVE D4# I CAN'T.. AND I'VE BEEN  TRYNING FOR MONTHS TO TRAIN MY MIX..

I WANT  TO TRAIN A  CHESTY MIX

IN GENERALLY  I SING THE POP SONGS. 

 WHAT CAN I DO ? BECAUSE NOTHING HELPED ME UNTILL THIS MOMENT FOR  DESCOVERING MY MIX...

Hi, Daniel! Try singing on the syllable "AY" (as in the word "day") with your mouth in a wide smile. See if you can slide from F3 to C4 (interval of a perfect 5th) on that syllable, and let the sound become a little lighter or more nasal as you ascend, without "breaking" into head voice. Move that pattern up in half-steps (ie: F#3 to C#4, G3 to D4, etc). That's helped a lot of my lower-voiced students stretch into their chest/mix!

Ok, but i have 2 questions.

The ay needs to be stacatto ?

Should i sing the notes  from the chord or note by note ?

Like   G major : G B D  or G A B C D ? 

I should have clarified! Legato (smooth and connected): slide from the lower pitch to the higher pitch, and then back down. The idea is that you're starting in chest voice and sliding into a chesty mix (so your vocal folds lengthen but stay firmly connected). You can do any melodic pattern, but I like G-D-G (sliding up and then back down)!

Ok , i will try  that and  i will come  back with some feedback ,thx.