Cannot find a working pocket legends install anywhere!

[Nickvio0294]

Hey guys so recently I've become interested in pocket legends and wanted to try it out.
To my dismay it just wasn't as easy as going to the market and downloading it. Why? Might you ask well because the app is non existent on the android market so I said okay lets try app brain and to no avail that did not work either it tells me that the selected item could not be found.
As a last ditch effort I download the pocket legends apk file and go from there
I open the apk on my samsung captivate and it tells me this
"Install blocked"
"For security, your phone is set to block installation of applications not sourced in Android Market"
I know for a fact people who have the captivate can run and do indeed have this game.
So why am I having so much trouble?
Can anyone help me out?