Cannot edit bash_profile on Mac OsX

I am using MacOSX Snow Leopard 10.6.8.... I am the only user on this machine and I should be admin.

I trying to edit my bash_profile to give it this simple alias:

alias server=' open http://localhost:8000 && python -m SimpleHTTPServer'

however when I use the terminal and type: vim ~/. bash_profile and paste in this alias I get message saying I cant save due to permissions.

So then I show all hidden files and go to fix the permissions on this file but the file is all grayed out.... I cant change anything. What can I do??