I have replaced master cynlinder, all four calipers, pads, brake line and I still don't have brakes. does anyone help?

 

Have you bledd all 4 calipers?

 

yes, all four bled as well as master cylinder bled.

 

after all was done I have a hissing sound, could it be I need to replace booster?

 

Welcome to the forum Gardenia.. just an FYI, you're in the 'new member introduction' section. You may receive a better response if you post your question in the respective forum for your Rover, accessed by clicking on the 'forums' button in the upper left hand corner of the screen, then 'vehicle line-up' and then your respective vehicle model (LR3, DII, yada yada yada).

Glad to have you here and good luck!