The problem may be that your version of Acrobat is not fully compatible with your operating system. One known problem is Acrobat 4.0 under Windows 98. If you're using Windows 98 Adobe recommends that you install Acrobat 4.05 or 5.0. If you're using Windows 2000 or Windows XP you should be running Adobe 5.0 or above.
If this does not clear up your problem please email webmaster@wildorcas.com.