请教IceGrid的问题

初学ice,想用一下iceGrid写了一个ice的实现，运行通过然后，写了一个config.grid配置如下IceGrid.InstanceName=HelloWorld#
# The IceGrid locator proxy.
#
Ice.Default.Locator=HelloWorld/Locator:default -p 12000#
# IceGrid registry configuration.
#
IceGrid.Registry.Client.Endpoints=default -p 12000
IceGrid.Registry.Server.Endpoints=default
IceGrid.Registry.Internal.Endpoints=default
IceGrid.Registry.Admin.Endpoints=default
IceGrid.Registry.Data=db/registry
IceGrid.Registry.PermissionsVerifier=HelloWorld/NullPermissionsVerifier
IceGrid.Registry.AdminPermissionsVerifier=HelloWorld/NullPermissionsVerifier
IceGrid.Registry.DynamicRegistration=1#
# IceGrid node configuration.
#
IceGrid.Node.Name=localhost
IceGrid.Node.Endpoints=default
IceGrid.Node.Data=db/node
IceGrid.Node.CollocateRegistry=1
#IceGrid.Node.Output=db
#IceGrid.Node.RedirectErrToOut=1#
# Trace properties.
#
IceGrid.Node.Trace.Activator=1
IceGrid.Node.Trace.Patch=1
#IceGrid.Node.Trace.Adapter=2
#IceGrid.Node.Trace.Server=3
运行icegridregistry --Ice.Config=D:\tptm\IceDemo\bin\config.grid提示错误：icegridregistry: error: property `IceGrid.Registry.Data' is set to an invalid path:
.\RegistryI.cpp:200: Ice::SyscallException:
syscall exception: 系统找不到指定的路径。请问这是什么原因，怎么解决？谢谢