jail problems

[Smux]

hi all, 
  I use the JailTools system of the The-Labs Company and I'm having problems when I add users in my jailed system. 
 In the first hours of use, the jail works in perfect state, however, when I go to enter with a user it I indicate the following error:

[root at brplus:~]# su radio
su: /usr/local/bin/bash: Permission denied
[root at brplus:~]#
[root at brplus:~]# su - radio
su: no directory
[root at brplus:~]#

Somebody can help me in this problem?
Regards

PS: I'm using FreeBSD 4.10-STABLE