安装Verdi总是提示端口被占用

按照网上的教程安装verdi 2009，生成修改license后拷贝进指定路径，设置好了环境变量。执行lmgrd $VERDI_HOME/license/license.dat后报错如下，说28001这个TCP端口号被占用。也没发现提示的什么using TCP-port xxxxx。哪位大神能指点迷津，告诉我如何破。
11:33:29 (lmgrd) -----------------------------------------------
11:33:29 (lmgrd)Please Note:
11:33:29 (lmgrd)
11:33:29 (lmgrd)This log is intended for debug purposes only.
11:33:29 (lmgrd)In order to capture accurate license
11:33:29 (lmgrd)usage data into an organized repository,
11:33:29 (lmgrd)please enable report logging. Use Acresso Software Inc.'s
11:33:29 (lmgrd)software license administrationsolution,
11:33:29 (lmgrd)FLEXnet Manager, toreadily gAIn visibility
11:33:29 (lmgrd)into license usage data and to create
11:33:29 (lmgrd)insightful reports on critical information like
11:33:29 (lmgrd)license availability and usage. FLEXnet Manager
11:33:29 (lmgrd)can be fully automated to run these reports on
11:33:29 (lmgrd)schedule and can be used to track license
11:33:29 (lmgrd)servers and usage across a heterogeneous
11:33:29 (lmgrd)network of servers including Windows NT, Linux
11:33:29 (lmgrd)and UNIX. Contact Acresso Software Inc. at
11:33:29 (lmgrd)www.acresso.com for more details on how to
11:33:29 (lmgrd)obtain an evaluation copy of FLEXnet Manager
11:33:29 (lmgrd)for your enterprise.
11:33:29 (lmgrd)
11:33:29 (lmgrd) -----------------------------------------------
11:33:29 (lmgrd)
11:33:29 (lmgrd)
11:33:29 (lmgrd) The license server manager (lmgrd) running as root:
11:33:29 (lmgrd)
This is a potential security problem
11:33:29 (lmgrd)
and is not recommended.
[root@localhost verdi]# 11:33:44 (lmgrd) The TCP port number in the license, 28001, is already in use.
11:33:44 (lmgrd) Possible causes:
11:33:44 (lmgrd)1) The license server manager (lmgrd) is already running for this license.
11:33:44 (lmgrd)2) The OS has not "cleared" this port since lmgrd died.
11:33:44 (lmgrd)3) Another process is using this port number (unlikely).
11:33:44 (lmgrd) Solutions:
11:33:44 (lmgrd)1) Make sure lmgrd and all vendor daemons for this
11:33:44 (lmgrd)license are not running.
11:33:44 (lmgrd)2) You may have to wait for the OS to clear this port.
11:33:44 (lmgrd) Retrying for about 5 more minutes
11:34:02 (lmgrd) Still trying...
11:34:20 (lmgrd) Still trying...
11:34:38 (lmgrd) Still trying...
11:34:57 (lmgrd) Still trying...
11:35:15 (lmgrd) Still trying...
11:35:33 (lmgrd) Still trying...
11:35:51 (lmgrd) Still trying...
11:36:09 (lmgrd) Still trying...
11:36:27 (lmgrd) Still trying...
11:36:45 (lmgrd) Still trying...
11:37:03 (lmgrd) Still trying...
11:37:18 (lmgrd) Failed to open the TCP port number in the license.

28001被用了就用28002，不行28003