Subversion: write through proxy, "svn copy" and "svn move" doesn't work at Mirror site

Question

I setup subversion Master and Mirror use its "write through proxy" technique. At mirror site. I tested:

1. update a single file and commit - works
2. add a new directory and files, then commit - works
3. delete a directory and files, then commit - works

4. try to move a diretory - Failed with following error:

   C:\temp\BlueChip_Mirror\trunk\Proj1>svn mv dir_AddFromMirror dir_new
   A         dir_new
   D         dir_AddFromMirror\newfile.txt
   D         dir_AddFromMirror
   
   
   C:\temp\BlueChip_Mirror\trunk\Proj1>svn commit -m ""
   Deleting       Proj1\dir_AddFromMirror
   Adding         Proj1\dir_new
   svn: Commit failed (details follow):
   svn: Server sent unexpected return value (405 Method Not Allowed) in response to COPY request for '/BlueChip_Mirror/!svn/bc/21/trunk/Proj1/dir_AddFromMirror'
   

5. try to create a tag using "svn copy" - failed with following error

   C:\temp\BlueChip_Mirror\trunk\Proj1>svn copy -m "" http://buildsrv.corporate.hcn.com.au/BlueChip_Mirror/trunk/Proj1 http://buildsrv.corporate.hcn.com.au/BlueChip_Mirror/branches/Proj1
   svn: Server sent unexpected return value (405 Method Not Allowed) in response to COPY request for '/BlueChip_Mirror/!svn/bc/30/trunk/Proj1'
   

I used Subversion 1.5.5, apache 2.2.11 on windows for the testing. Can anyone help to get around "svn copy" and 'svn mv' issue I had.

Many thanks Henry