UNIX for Dummies Questions & Answers

Hi..
I need to decrypt a file in Solaris.
I'm giving command as
crypt decrypt_key filename.locked filename.unlocked
where
decrypt_key is the key key for decrypting the file.
filename.locked is the file thats encrypted and I need to de-crypt
filename.unlocked is the new file that I need

When I give this in the unix box I'm able to key in the decrypt_key , filename.locked and filename.unlocked, but the cursor keeps on blinking...
looks like m/c hangs thereafter..
I've no clue of whats happening...
My filename.locked is something like
exp_abcd_RCD_rep1234[1].dmp.Z.locked


Can someone pls guide..Is it that I'm giving wrong commands or is there some other problem..

Try:
crypt decrypt_key <filename.locked >filename.unlocked