Problem installing components under Delphi3

hello i have tried to install components under delphi 3 with little

these are components which i have derived using the delphi3 component
wizards, and when the .MyNewcomponent.pas is added and asked to
compile it gives me 'couldnt find MyNewcomponent.dcu'

now in delphi 2 have done the same and it works ok. have i misssed