SQL & PL/SQL

i want to truncate my table called l_gsm_pop_gprs_e, i am using below query but its not working its giving error like
ORA-03291: Invalid truncate option - missing STORAGE keyword.
can anyone tell me what is the right query to truncate my table

query:
truncate table l_gsm_pop_gprs_e nowait drop storage;

ORA-03291: Invalid truncate option - missing STORAGE keyword

earlier i was getting this below mention error when i was not using truncate statement.
ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired


plz reply
thnx in advance.