Well I was having a huge problem with my install at first. I was getting a blank screen when I accessed the webmail, did not even get the login screen.
I found out from the error screen that the problem was with my PHP install on my server. PEAR DB was not installed which is needed for RoundCube.
I am using HOST FOR WEB //www.hostforweb.com as my VPS proider. I contacted them and they installed PEAR DB and now it is working like a charm. I love this program so far.
Just thought i would add this in case anyone else is having a problem was i was.