Are you using IIS 6? After modifying the metabase.xml file, have you stopped IIS so you can save this file?

 

This is a server-related limitation. IIS6.0 prevent the upload of files more than +200Kb. So you need to make some changes in the default IIS settings first.

The solution is here:

IIS 6.0 (Windows 2003) has a file named metabase.xml which resides in the C:\Windows\system32\inetsrv folder. Navigate to that directory and edit the file. Search for an entry called AspMaxRequestEntityAllowed. This defaults to a value of 204800, which causes IIS 6.0 to limit allowed upload size to 204,800 bytes.

 

Changing this value to a large number (such as 2000000000 for 2 gigabytes) will allow your Windows 2003 server to accept large uploads.

 

If your server does not allow the Metabase Edit-While-Running feature, you will need to stop the IIS service before you can save the metabase.xml file.