This is a problem with the default setup of Linux which restricts the amount of runtimes that can be used at any one time.  To fix this you will need to log on as root and edit the /etc/xinetd.conf file.

Example:

#
# xinetd.conf
#
# Copyright (c) 1998-2001 SuSE GmbH Nuernberg, Germany.
# Copyright (c) 2002 SuSE Linux AG, Nuernberg, Germany.
#
defaults
{
        log_type        = FILE /var/log/xinetd.log
        log_on_success  = HOST EXIT DURATION
        log_on_failure  = HOST ATTEMPT
#        only_from       = localhost
        instances       = 60
        cps             = 50 10

Above is the top few lines of a xinetd.conf file.  As you can see the 'instances' value is currently set to '60'.  If your runtime license exceeds this amount (or the amount shown in your xinetd.conf file) you will need to change this value to at least the amount of runtimes your license allows to be able to use all of the runtimes.  Once you have saved the file you will need to restart the xinetd service for the changes to take effect.