Migration mess

[Ian_135]

Hi.
Since migrating from NT4 to Windows 2003, HPSIM (v.4.1) has croaked. Whether this is due to something coded into the SIM database or openssh, I'm not sure.
If I connect through a browser I get the error "The connection was refused when attempting to contact 'server:port'". If I start SIM from the CMS, "Checking HTTP server status" is the only thing I get.
All services start correctly; reverting to SIM service accounts for the old domain make no difference.
Now seems like a very good time to upgrade to version 5 (!) but is there any way I can preserve previous settings? Will a fresh install leave clutter on clients & could this cause conflicts?
Any advice would be greatly appreciated.
Thanks, Ian