Falko - thanks for the reply.
All of those packages are installed and I reinstalled them just be be sure. Same error but sometimes during a different part of the installation. The strange thing is that MySQL is running, shows up on the netstat and I can login and use it normally. When I run the ISPconfig setup, however, it stops somehow. Sometimes this happens during the initial system check, sometimes during the error message I posted below and just recently, at the very end. The mysqld log shows that it's being shutdown every time I run the ISPconfig setup.