I believe you may have permission issues not directly related to whether Fusion 5 works with Mavericks. I have started a seperate thread that includes the answer to Fusion 5 on Mavericks. Let me know what you figure out.
Permission Issue: Do you have a seperate partition or disk? If so make sure the User you are logged in with has full read/write permissions all the way down to the location of your VM guest files. Get Info ( COMMAND/APPLE I "eye") and check the ownership and permission.