What is the directory you're uploading to (and you're _sure_ the permissions are correct? What is the url you're using? What's the exact browser error (i.e. what does "nothing happens" mean)?
Also, be sure to take a look at How (Not) To Ask A Question and also at Writeup Formatting Tips for how to use code and readmore tags to make it easier for everyone to see/read/understand (read: be willing to respond to) your post.