Not UBB, but problem on Mindraven server after move to new server. Our gallery software is not creating thumbnail images anymore. Here are the error messages I am seeing.. Thoughts?

Code
[11-Nov-2011 09:24:41] PHP Warning:  escapeshellcmd() has been disabled for security reasons in /home/fgmcccom/public_html/photopost/adm-misc.php on line 1989
[11-Nov-2011 09:24:41] PHP Warning:  system() has been disabled for security reasons in /home/fgmcccom/public_html/photopost/adm-misc.php on line 1991