I simply follow instruction from http://serk01.wordpress.com/2008/09/21/how-to-create-your-own-home-svn-repository-with-xamppapache/ about producing svn repo with xampp/apache. Everything runs well except after i access http://localhost/svn it show error message.

After I view source, this is actually the error:

<?xml version="1.0" encoding="utf-8"?>
<D:error xmlns:D="DAV:" xmlns:m="http://apache.org/dav/xmlns" xmlns:C="svn:">
<m:human-readable errcode="160043">
Could not open the requested SVN filesystem

Anybody experienced such as this before? What's the problems?

Well, which version have you got? And which OS? This is a bug in version 1.6.6 (r40053) and you have to change permission on repo/db/db-repetition.cache on 660