add mail list [Errno 28] [Errno 2]

My web host is using Cpanel 4.5.0-STABLE build 136. When I go to Mailing List Maintenance and Add List, I enter the list name, password, my domain and click Create, I get these results and nothing is created:

Traceback (innermost last):
File &/usr/local/cpanel/3rdparty/mailman/bin/newlist&, line 220, in ?
main()
File &/usr/local/cpanel/3rdparty/mailman/bin/newlist&, line 169, in main
mlist.Create(listname, owner_mail, pw)
File &/usr/local/cpanel/3rdparty/mailman/Mailman/MailList.py&, line 782, in Create
Utils.MakeDirTree(os.path.join(mm_cfg.LIST_DATA_DIR, name))
File &/usr/local/cpanel/3rdparty/mailman/Mailman/Utils.py&, line 261, in MakeDirTree
os.mkdir(made_part, perms)
OSError: [Errno 28] No space left on device: '/usr/local/cpanel/3rdparty/mailman/lists/testing_inthelamb.com'
Traceback (innermost last):
File &/usr/local/cpanel/bin/cp_mailman_suexec&, line 44, in ?
raise SystemExit(main(sys.argv))
File &/usr/local/cpanel/bin/cp_mailman_suexec&, line 29, in main
file=open('/usr/local/cpanel/3rdparty/mailman/lists/' + list + '_' + domain + '/config.db','r')
IOError: [Errno 2] No such file or directory: '/usr/local/cpanel/3rdparty/mailman/lists/testing_inthelamb.com/config.db'