Uploads not working with filezilla or my server

I just have been encountering many problems with my wordpress and I really don’t understang scripting or programming. When I try to upload adsense deluxe.php it shows in the filezilla box that it has been uploaded but when I look at the file size it says it is zero. Another problem is with filezilla after a while it says “could not connect to server” and I don’t understand why it only allows me to connect sometimes. I use 1and1 as a host but their customer service sucks. I had adsense delux installed before but now none of the plug ins I upload work because nothing but the folder names upload to my server. Also the ajax contact form shows up when I click dashboard. I’m a mess here…thanks for your advice.