Why does my radiator hose come off when starting it.?

i just changed my radiator and put a brand new one in. but when i finished putting it back on. and put water in it . and tried to start it it just rived and then the main hose on top blew off. put it back on and tightened it and then the big hose on the bottom blew off. why is this happening. also the car did not start. it is a toyota camry 1992 thanks|||You have the wrong hose TIE... You need a hose CLAMP. And make sure there isn%26#039;t air in the line... But your car needs to be started for you to check that. ALSO if it%26#039;s not starting then check your fuel pump.|||you have to much pressure being put on the engine and it isnt letting the coolant flow right. if its not starting now, its a good possibility that you locked up your engine, that is if its not even turning over. check and make sure you have to correct coolant to water ratio as well.