I guess you encrypted your SSL certificates for the ISPConfig server with a apssword andnow the ISPOConfig server wont start when the password is not entered.
Please create new SSL certificates as described here:
http://www.howtoforge.com/forums/showthread.php?t=121
and make sure you select "n" when you are asked if your certificaes shall be encrypted. This is described in the ISPConfig installation manual.