When I run the following export command with I get the following error:

exp system/manager@dev1 parfile=/usr/local/oracle/export/export_tablespace.parfile


EXP-00044: must be connected 'AS SYSDBA' to do Point-in-time Recovery or Transportable Tablespace import
EXP-00000: Export terminated unsuccessfully


The following is my EXPORT PARFILE:

FILE=/usr/local/oracle/export/export_tablespace.dmp
TABLESPACES=(USER_DATA, USER_IDX,APP_DATA)
TRANSPORT_TABLESPACE=Y

P.S.: I did make these tablespaces READ ONLY.
(Oracle 8.1.6 SunSolaris 5.8)


Thanks in advance! Hope someone would respone ASAP....