This has been happening for a few days now everytime I download a .zip file whenever I try to extract the files it tells me theres no files to extract this has happened from every site I have downloaded from including the lord ofthe rings official site and Zoo Admin. I dunno if its my computer or something else but I'm not aware anything has been changed on my PC. I have windows XP any help would be greatly appreciated! Thanx
Most likely it is something on your end. I have recently downloaded from Zoo Admin without problems. However, they have been doing some rearranging of their download area and certain ones may have problems as a result.
Instead of extracting, do you try just opening the file? (Right click, choose Open with.) That might tell you if the downloads are corrupted or not. Did you try downloading the Desert Terrarium from here? It is in a zip file as well and that might help determine if the problem is more universal.
Just downloaded the Desert Terrarium and it unzipped fine infact everything seems to be working fine now must have been my computer playing up on me again. Thanx for your help
I know you fixed your problem, but as a matter of interest to anyone else this happened to me once when I tried to use WinRar. The time limit had expired on the trial version. It came right when I reinstalled the program again. Had your Winzip trial expired
this has happened from every site I have downloaded from including the lord ofthe rings official site and Zoo Admin. I dunno if its my computer or something else but I'm not aware anything has been changed on my PC. I have windows XP any help would be greatly appreciated! 
Thanx
must have been my computer playing up on me again. Thanx for your help