Just an FYI - Your Apache Server version is EOL (reached End Of Life): Apache/1.3.42 Server. Ask your Host to move you to another Server with a current version of Apache installed. This may or may not be related to the problem with installing BPS, but should be done either way.
1.3.42: Released Feb. 2, 2010 [EOL]
http://www.apachehaus.com/index.php?option=com_content&view=article&id=119&Itemid=104
