X-terminal can't open file from Server

[zs_hzh]

hi,

i have two envizex2 which are connected to an HP-UX server running Netstations


Installed versions:
No ACTIVE_VERSION VERSION #
====================================================
1) yes B.07.11 (ENWARE SW)
2) no B.09.11 (Netstation SW)
====================================================

but the problem is this two terminal can't log in application server anymore ,from his log file ,it says 'can't open files on server '

do you have an idea of why this happened .

something that i dont' sure was:
1.if the ethernet was ok ,can i telnet to app server ? now i can see the mac address from server ,but it can't actually telnet to server
2.according to hp doc .
HP ENVIZEX II and HP ENTRIA II Netstations running HP Netstation Software 9.0. For information about these Netstations, see this book
why my active verion was b.07 instead of B.0.9
when i switched it to the new one ,it still say active one is old ?