iATKOS - OSX doesnt boot - Crossed Circle?

[quantass]

I was able to install iATKOS v5i onto my Toshiba Qosmio X300 laptop however it was only able to install onto an external USB SATA HDD not the internal SATA HDD. I dont get it. The install goes fine but when it comes time to boot into OSX for the first time it sit idle at the gray screen for a minute or so then displays a crossed-circle over the apple logo. I have no clue what that symbol is supposed to reprsent. I suppose the geniuses at apple couldnt find any extra space on screen for a descriptive error message.

What can i do to get install to work from my internal drive? The external drive works perfectly fine. Could this be a SATA controller issue?