all tables r disappeared dont know why or how !! i'v created new account and it still disappeared ,, plzzzzzzzzz help me to solve this problem

regards

i'v created new account

you mean a new schema ...... if so , than it's normally that you don't found any objects.

On the Other Hand execute this code in the old schema - that you surprised with disappearing of all your objects in it :-

select ORIGINAL_NAME, TYPE from user_recyclebin ;

and let me know the Results , or give me more information if you have.

have a nice day