how can I do when my acrobat professional 6.01 is not compatible with WIN7 system?

If you are lokking for loopholes or workarounds - they don't exist. Your only option is to buy a new license of Acrobat XI. Of course, depending on what functionality you need, there are enough alternative, cheaper tools to create and edit PDFs or even free tools. Most of them won't deal with forms or otehr advanced features, though, but as long as you only want to convert your Word files to PDFs, the'll do the trick and you don't need Acrobat.

Mylenium