When I start JBoss v4.2.3 on my computer I get always an startup error

java.rmi.server.ExportException: Port already in use: 1098

netstat -ano

shows no other process which is blocking this port.
So I decided to reserve ephemeral ports like described e.g. here:

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=64248

with a *.reg file like:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"ReservedPorts"=hex(7):31,00,30,00,39,00,38,00,2d,00,31,00,30,00,39,00,39,00,\
00,00,00,00

However this did not help.

Why?

The only way was to change the RmiPort in jboss-service.xml from 1098 to 1198

Why did the Registry patch not help?
Do I have to re-boot for getting the Registry patch be active?

Are there any problems when changing the jboss-service.xml RmiPort?

Peter