Roundcube 0.3.1: SERVER ERROR! (Method not Allowed)

[PuReMaN]

I had some problem after installing Roundcube 0.3.1, everything was fine until i was want to compose message and fill the  "Recipient" box, it shown message "SERVER ERROR! (Method not Allowed)" on every character Input. :confused:

Another Error was found on Read Message, When I click on the "Arrow" below the Msg Date also Shown the same error message "SERVER ERROR! (Method not Allowed)". :confused:

Another error message when click on "Upload" File Attachment its shown "File Upload Failed"

OS : Windows XP
WebServer : IIS 5.1
MailServer : hMail 5.3.2.1769
PHP : 5.2.9-2
MySQL : 5.1.43

Please anyone can help to solve this problem.. thank you.

[SKaero]

Is there anything in your error logs?

[PuReMaN]

There are nothing on my Error Log.. :confused:

[SKaero]

Check the permissions on the logs folder and if it still shows no logs change $rcmail_config['debug_level'] to 4 in the /config/main.inc.php

[PuReMaN]

There was no problem with the log access, coz the old log about the login problem on iis is written there also and thats already fix it, but there still no log about the "Server Error! (Method not Allowed).

I already try to change $rcmail_config['debug_level'] to 4, but nothing happen.. :confused:

And this is the capture for the following error :