You have to specify the target as well. Try it like this:

/ja "Boost" < me >

/ws "Combo" < t >

.... yes, DO capitalize where the game does or it won't work. It's not burning blade, it's Burning Blade.... That one got me for a while before I figured it out

And remove the spaces between the targetting tags, I put em in their 'cause the bbs seems to think I'm trying to use them to code when I type them properly :P