Installing Themes

I have my own theme that I bought which I will use in my website. I am currently using the 7day trial webhosting. I followed the instructions on how to do it but after uploading the theme in dreamhost wordpress, upon 100% uploading, the screen says

screen photo:

The screen says : are you sure you want to to do this ?

of course i want. but there are no other option but to try again.

Thanks in advance.

Did you install wordpress via a one-click install? If so, did you choose ‘simple’? If so, you will need to do it over using custom. With simple installs you can’t add theme’s.