notloading Not a single mod pack is Loading

[TBGS_Destroyer]

So i got Technic and i thought it would be cool yea alot of modpacks and stuff ... so i downloaded pixelmon so i can play with a friend and i clicked play  it loaded then it closed the  launcher and re-opened the launcher saying nothing and i tried this for several modpacks its the same for all of them my java is up tp date 64-bit and i dont know why anything isnt loading??

[JaariAtmc]

Its probably because your java is up to date. Use 8u51 instead.

[TBGS_Destroyer]

14 hours ago, JaariAtmc said:

Its probably because your java is up to date. Use 8u51 instead.

i tried downloading 8u51 but im not sure if i got the right download can you help me out?