Plurk to Facebook and Twitter by using PlurkBuddy

I've set the "Plurk to Facebook and Twitter" according to the instruction, and I also add the PlurkBuddy to my MSN.

When I use the PlunkBuddy to update my Plurk, I can not see my message on my Twitter, but I can see my message both on the Plurk and Facebook.

And if I use Plurk website to update the Plurk, then I can see my message sync to the Fcebook and Twitter correctly.

Is this normal? Anything I missed? How can I sync my message to the Facebook and Twitter by using the PlurkBuddy?

Thanks!