Newbie Needs Help!

Hello,

I basically created a free blog on wordpress.com called cashwithcara.wordpress.com. Then, I bought the domain cashwithcara.com through WP and mapped it. Now, I have signed up with GDI (global domains international) and instead of making a new domain I told them to use cashwithcara.com. I then transferred the nameservers inside WP to GDI’s nameservers so that it can be hosted there. I want to be able to have plugins etc on my site so I tried to down load WP 3.4.2. I have filezilla and can log into the GDI servers. However, I get lost when it comes to the error I get in the install.php file. It says that the server doesn’t have php….but I know that GDI has some sort of wordpress integration already. Please help and I would appreciate if someone can walk me through the whole rest of the process.