I have Windows Server 2003 with IIS6. Every time I request something that ends with .asp server returns a 404 error, but not a usual one, the error response is as follows:

```
HTTP/1.1 404 Not Found
Content-Length: 93
Content-Type: text/html
Date: Tue, 07 Jun 2011 07:14:27 GMT
Connection: close

<html><head><title>Error</title></head><body>�� ������� ����� ��������� ����.
</body></html>

```

What's the origin of this error and how can I fix this?