Another thing might be to clear out the HnH temp files that may have been loaded already. These are located in different spots if you're using Windows XP/Windows 7.
XP: C:\Documents and Settings\*username*\.haven
Remembering to replace *username* with your WIndows log on name
and also change the drive letter from "C:\" if you've assigned your windows partition to a different drive.
Win 7: C:\users\*username*\.haven
I'm only assuming with this one here
I'm not at home and can't confirm but should be roughly there
I've had this issue on my work PC, getting haven running was a tough time, but I found deleting everything inside of the .haven folder and waiting a shit ton of time was the fix.
Good luck fran hope this halps.