tns error

[art]

hi all i installed personal oracle 8i on my pc and also jdeveloper in net8 configuration assistant i want to configure service name and also listener in this case for listener when i selecet IPC  i recieve a message that said it has conflit with another software and also when i test my local new service name it is not succesful and therefor i cant connect help me what should i do to solve this problem and also what i  must set up for my jdeveloper thanks artemis zarnegar