Welcome abroad yotam_u.
Are you sure that you completely uninstalled SHIV (cleaned the registry, etc.) before reinstalling it? There's a Sticky in the forum about how to do it properly.
If you did not have this problem before while running the same mods, obviously something is amiss. Why did you have to reinstall SHIV anyway? Did you have to reformat or reinstall Windows too? Were you having some type of computer problems?