I am using QNX 4.24 server with Phindows 2.0 and Photon since 2001 without any problem. For a specific user, I use to 
autostart an application immediately after a succesfull login (in this case "sac" utility in passwd file)

jd213:x:105:100:John Doe:/home/jd213:/usr/bin/sac

I installed QNX 4.25 (last 2011 installation CD bundle) on a new server with creating the same user jd213. If I use /bin
/sh in passwd file, it is OK, Photon is started when I logged in from Phindows. Unfortunately this autostart is not 
working anymore when I try any other autostart executables like /usr/bin/sac when I login from Phindows. Phindows Window
 is closing right away without charging Photon. However when I try to login from telnet, "sac" execution is working, 
Photon is charged after Phindows login. Curious isn't it ?

Does any of you have ever this problem? If yes, what could be the solution

Thank you