Open_basedir Restriction In Effect Error?, Error in debug.log, no statistics are produced Options

[petrm]

Hi there. Does someone know what means this report in debug.log and how to solve that error please?

[ warning] is_readable() [<a href='function.is-readable'>function.is-readable</a>]: open_basedir restriction in effect. File(/MDB2/Driver/Extended/mysql.php) is not within the allowed path(s): (/var/www/vhosts/somewhat.com/subdomains/ad/httpdocs:/tmp)

It appears after the finish line "Maintenance Engine Completed"

The home directory of my OpenX installation is:
/var/www/vhosts/somewhat.com/subdomains/ad/httpdocs/openx/
Running OpenX v2.8.7 on Apache 2.2.3, PHP 5.1.6 and MySQL 5.0.77

Update (morning): So, the statistics are produced finally. But anyway I would appreciate to solve that error in
debug log. Thanks.

Thanks a lot
PeteM