Note that you can use LS-PrePost to create the *LOAD_BLAST_ENHANCED keywords to ensure you have the correct format. You can download LSPP here:
https://ftp.lstc.com/anonymous/outgoing/lsprepost/4.9/

Then, you can save the .k file using LSPP and open the .k file with a text editor to retrieve the keyword.
Let me know how it goes.
Reno.