Mkay.. First of, is the user in the group, etc etc?
second, try this:
Code:

IF INGROUP("ITDEPT")
'In group ITDEPT' ?
USE T: "\\SERVER1\APPS"
@ERROR ' - ERROR' @SERROR ' - SERROR' ?
ELSE
'NOT in group ITDEPT' ?
ENDIF


IF INGROUP("FINANCE")
'In group FINANCE' ?
USE P: "\\SERVER3\ACCOUNTS"
@ERROR ' - ERROR' @SERROR ' - SERROR' ?
ELSE
'NOT in group FINANCE' ?
ENDIF


IF INGROUP("SURPAC USERS")
'In group SURPAC USERS'
USE G: "\\SERVER9\DATA"
@ERROR ' - ERROR' @SERROR ' - SERROR' ?
ELSE
'NOT in group SURPAC USERS' ?
ENDIF

Second, is the drives already mapped?