I have been working on installing alfresco for a little while. Everything works properly except for the fact that when a user uploads a file to alfresco share they cannot preview the document. The only error that is given is a flash box stating "The preview could not be loaded form the server." I have looked in the alfresco log file but have not been able to find anything. GIF files work fine, cannot view csv, doc. I am a little new to alfresco so any help debugging this will be greatly appreciated.