error when inserting photo on page

When I insert a photo into a page I get this warning:

Warning: file_exists() [function.file-exists]: open_basedir restriction in effect. File(C:\Windows\Temp\php8114.tmp) is not within the allowed path(s): (C:\Inetpub\vhosts\enjoytoday.be\httpdocs\) in C:\Inetpub\vhosts\enjoytoday.be\httpdocs\wp-includes\functions.php on line 2402

Dismiss“test.jpg” has failed to upload due to an error
The uploaded file could not be moved to C:\Inetpub\vhosts\enjoytoday.be\httpdocs/wp-content/uploads/2010/06

How can I resolve this problem?
I tried to upgrade to a new version, but even then I could no longer log in

By using the browser uploader I get this massage:

Warning: file_exists() [function.file-exists]: open_basedir restriction in effect. File(C:\Windows\Temp\php953E.tmp) is not within the allowed path(s): (C:\Inetpub\vhosts\enjoytoday.be\httpdocs\) in C:\Inetpub\vhosts\enjoytoday.be\httpdocs\wp-includes\functions.php on line 2402

Warning: Cannot modify header information – headers already sent by (output started at C:\Inetpub\vhosts\enjoytoday.be\httpdocs\wp-includes\functions.php:2402) in C:\Inetpub\vhosts\enjoytoday.be\httpdocs\wp-includes\pluggable.php on line 886