I got some errors on upgrade fromWSN Links 5.0.33 to the current version:

An error occoured at http://www.accommodation-uk.net/upgrade.php?usewrapper=no&getgoing=1&updatestyles=1&updatetemplates=1&skipcustomupdates=1&autotool=1&fromfree=0 on 2009-07-13 10:41:44. Please relay this data to support. Error #2: 'chmod() [<a href='function.chmod'>function.chmod</a>]: Operation not permitted' in /home/accommod/public_html/includes/filefunctions.php on line 860.
Step 1 of backtrace: 
File: /home/accommod/public_html/includes/filefunctions.php
Line: 860
Function: chmod
Arguments: /home/accommod/public_html/suggest.php 438 


Step 2 of backtrace: 
File: /home/accommod/public_html/upgrade.php
Line: 159
Function: apachechmods

and


An error occoured at http://www.accommodation-uk.net/upgrade.php?usewrapper=no&getgoing=1&updatestyles=1&updatetemplates=1&skipcustomupdates=1&autotool=1&fromfree=0 on 2009-07-13 10:41:44. Please relay this data to support. Error #2: 'chmod() [<a href='function.chmod'>function.chmod</a>]: No such file or directory' in /home/accommod/public_html/includes/filefunctions.php on line 860.
Step 1 of backtrace: 
File: /home/accommod/public_html/includes/filefunctions.php
Line: 860
Function: chmod
Arguments: /home/accommod/public_html/addpoll.php 438 


Step 2 of backtrace: 
File: /home/accommod/public_html/upgrade.php
Line: 159
Function: apachechmods