m using Windows Vista Business 32 bit , Oracle

while running my setup so many time i got same error each and every time Error:12560 TNS Protocol Adapter error and it shows me i attached my screen shot with my thread , and remember i already installed earlier but at that time there was no error and successfully installed, i removed the total software before installing and i also removed my enviroument variable and after getting this Database Configuration Assistant failure there is no service is started regarding my database.. i also tried manually but there also i got some other problem if by Database Configuration Assistant it ll b solved then it ll be good for me..