Server Error in '/BRRLSU' Application.

[Julia999]

I run my web page from .net, is good, in localhost -http://localhost:3457/IFWebSerivce/TestIProvision.aspx

but set the virtual dir in IIS and want to run
from browser/server,
http://ofacbr.worldnet-dev.ml.com/brrlsu/WebServiceCall/IFWebSerivce/TestIProvision.aspx

I got error -

Server Error in '/BRRLSU' Application.
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Runtime Error
xx
This <customErrors> tag should then have its "mode" attribute set to "Off".
********************
I have code in web.config-
<customErrors mode="RemoteOnly" defaultRedirect="TestError.aspx" />

when I follow above message change to <customErrors mode="Off"

I got error-
Server Error in '/BRRLSU' Application.
--------------------------------------------------------------------------------
Configuration Error
Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level

the server is win 2000, my local is window xp,
I use .net 2005, installed .net framework in server today,
yesterday not install the framework in server, that time no error,
but only show label, the text box and button controls are lost.
so today download/install .net framework 2.0
then got -
Server Error in '/BRRLSU' Application.

Appriciate to get your help,
Thanks, Julia