Hi Fan,
What verson of Word are you using?
Are you referring to the MathType toolbar in Word or just adding an icon to a Word toolbar that will run MathType?
Did you download the 30-day trial edition and if so has the trial expired?
If so, as I understand it, at that point it becomes a 'lite' version which does not include the Word toolbar add-in (although I
didn't see a link for a feature comparison table for the 'lite' and full versions of MathType 6 at
http://mathtype.com/en/products/mathtype/features
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I have Mathtype 6 on my computer, and need to have it available from the MS
Word toolbar. How is this accomplished?>>
--
Bob Buckland ?

MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*