Password protected xlxs

Been asked to "unlock" a password protected xlxs file. I tried a few methods from google/youtube but not having any luck. Any ideas?

hope this helps

Thanks for the link Alex, unfortunately it didnt work. Cant believe how difficult this is...

Try debugging the program in a Debugger such as OllyDbg and use some Assemble language to make the password part of the program jump over that memory.