Problem Installing Elgg 1.5 Please Help!

Hello, I have just started using the hosting of Sitefrost and am having problems installing Elgg 1.5.

I have done it previously on other hosts but never got this error.

I have uploaded the files, added the Database.
On the second page after providing my email address, the path of the data folder(where Elgg stores its member data and all that) and click on 'Save', I get a strange problem that I have never had.

Please, take a look at the screenshot I have attached and suggest me remedy.
   
image

Another thing, if I visit the original URL (http://mysite.sitefrost.com) I again get the option to enter the MySQL Databse and User info.