i have a problem with my clone tool on my adobe 4.0 program it does not clone/copy" completely. help?

i consider myself an expert of sorts with this program having photo shoppedliterallyy thousands of pictures..i had the adobe 4.0 for ell over 10 years and use it regularly..with one click i could thoroughly andcompletelyy clone an eyeball or face or tree etc. etc...theclonedd copy would have all the resolution of the original with just one click.. HOWEVER about 2 weeks ago , ALL AT ONCE it began cloning only a faint image of the original which sit atop the existing photo...

example : in the past if i were to attempt to clone an eyeball over a small rock , with just one click of the mouse the rock would be replaced completely with the eyeball..NOW when iattemptt thisproceduree a faint eyeball sits over the rock....i know its nothing i'm doing different//i know how to use the tool..something in the mechanics of the tol has changed..how can i get it back to working properly? thank...thats all the info i have...