we have two database server one is oracle and oracle 8.1.7.. iam doing the export of some tables from 9i database and trying to import in 8.1.7 database using 9.0.1 client, iam facing error

Export file created by EXPORT:V09.02.00 via conventional path
import done in WE8MSWIN1252 character set and UTF8 NCHAR character set
import server uses UTF8 character set (possible charset conversion)

IMP-00003: ORACLE error 2248 encountered
ORA-02248: invalid option for ALTER SESSION

IMP-00000: Import terminated unsuccessfully

is there any solution for this error...