Domain Mapping Issue

1- I use a share hosting with IP as 174.132.xxx.xxx
2- My roots is therefore 174.132.xxx.xxx/username
3- Site is at 174.132.xxx.xxx/username/wpmusite
4- I created a blog at blog1.wpmusitewide.com
5- I created an A record as follows (just using the IP address: http://www.screencast.com/users/Joe-Cast/folders/Jing/media/8e4f4f0a-1223-4420-b053-da1b4e9aa4d3
6- When I browse to the domain, I get the following page, not the blog: http://www.screencast.com/users/Joe-Cast/folders/Jing/media/11f0f8b6-2de3-4b66-86a2-438086d02ba7
7- http://www.screencast.com/users/Joe-Cast/folders/Jing/media/d28085f6-934c-4c73-8916-5fda60b78361

What am I doing wrong?