Hello all and i hope thi sis the right category where to post this question , if not i apologise

I recenlty migrate my website from wordpress to movabletype( i know many people just to the MT to wp But is personal taste)

I wanted to redirect all my old urls since now i got a situazion like this:

[www....] mywebsite.org/?p=185 and i wanted to make it
[www....] mywebsite.org/article.html
So i did few try in this way :
RewriteCond %{QUERY_STRING} ^p=185$
RewriteRule ^$ [mywebsite.org...] [R=301,L]

But not worked at all , any idea?

thank you all