program: apache 2.0.54 with MPM
apparmor: devel version.
sys: fedora core 4.

I added module apparmor to apache 2.0.
When apache call change_hat module, this return error in line:
        ret = write(fd, buf, len); // return -1
errno = 13
This problem write log to syslog:

Mar 16 11:47:25 micro kernel: SubDomain: subdomain_setprocattr: Attempt by foreign task httpd(27962) [user 400] to changehat of task httpd(27960)

This problem occurs with 2 virtual domains;
one -> ImmDefaultHatName some.domain
other -> ImmDefaultHatName some.other.domain

and without above lines in configs of virtual domain.

hardware:
2 x opteror 244 (x86 - 32bit mode)