Installing Oracle 9I apps Server on Win2000

[san_mat]

I want to install oracle 9I apps. server on Win 2000. I do have Oracle 8I installed on the same machine. I followed the prerequisites needed for installing 9I. It shows up the screen for installing , ask for the components & method for installation & then suddenly comes out of the system giving no messages. What is this problem.
Any help in this matter will be greately appreciated.