I am developing a web application on my notebook, ThinkPad X60, which has both 
LAN and Wireless LAN.

When I connect to a network. I can deploy my web application and use any 
feature well.

When I unplug my LAN (usually I use LAN at my office), the ThinkVantage Access 
Connections will switch my machine to use Wireless LAN. In this case, I also 
can deploy my web application and browser start.

When I turn off Wireless LAN (and no LAN), the ThinkVantage Access Connection 
show status "Disconnected". My web application cannot deploy and browser 
cannot start. The output is as follow:

...
Starting server Bundled Tomcat (5.5.17)
Starting of Tomcat failed, the server port 8084 is already in use.
E:\JavaProjects\WebTest\nbproject\build-impl.xml:521: Deployment error:
Starting of Tomcat failed, the server port 8084 is already in use.
See the server log for details.
BUILD FAILED (total time: 4 seconds)

When I restart my machine and run NetBeans again with no network connection 
(both LAN and Wireless LAN), the output finish at the line "Starting server 
Bundled Tomcat (5.5.17)" and the annimation status of deploying web annimate 
for a long time.

First times, I think that the problem is related to the ThnikVantage Access 
Connection. So, I tried to solve this problem by uninstall the ThinkVantage 
Access Connection, but the result is the same.

After tried many ways. Then, I found that. When I work at home with no network 
connection, I can deploy web application if disable all network cards. (At the 
Network Connections window, right-click at each network (LAN and Wireless LAN) 
and select disable)

I do not understand, why? Is this a bug?
This happend on both NetBeans 5.0 and 5.5.