help please urgent

[harb88]

i just to know if i can apply for visit visa ..because my immigration application is denied because ma father who applied for died..now my sister has cancer she wants me there for for one month ..im Jordanian but l live in Saudi Arabia i work here ..and im stable here just want to help my sister in these tough days..before i applied for visit visa to see sick my father before dying and they refuse because at that time my immigration application still valid.. i want want to know what should i do to convince them? what document i need ? do i need a letter from my sister or form the her doctor ? from the hospital ? i need a copy my sisters american passport ?
for your information that's may help ..i have in my balance account around 4000 $ and im 27 single i have no criminal issues and all my family history in usa is legal .. please anyone help me if you had the same case ..please comment here ..Thank you all