VM RS problems.

I have the 2011 Macbook Pro '13, the whole installation process of VM went smooth, I installed the multi core version of it and updated everything like Microsoft and Java. My problem starts when I try to run the bot. My VM's Chrome browser goes on a blank screen after a minute or so of running it (constantly), and that causes the bot to stop and having to re-log in and it is just annoying. Is there a way that I can fix that? Would adding more memory or anything like that to the system help? Thanks in advanced.

Edit:

This is the guide that I followed: http://www.robotzindisguise.com/for...w-to-Minimize-Your-Bot&highlight=blank+screen