Disable_functions

I moved to a new didecated server, after moving some secripts don't work any more like : php upload center that change the photo name and write the site name under the photo. when I try to upload any image the page reload without any result nor errors!

when I took a look to the php info I found many fanctions are disable.

Now I don't know which function is the one which couse this problem.

disable_functions:

Code:
dl,exec,shell_exec,system,passthru,popen,pclose,proc_open,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,escapeshellcmd,escapeshellarg,dl,exec,shell_exec,system,passthru,popen,pclose,proc_open,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,escapeshellcmd,escapeshellarg
my php Version 4.4.4