AS dynamic text question

programming flash
1

I feel stupid. Anyways, this code won’t work:

 setProperty ("Main Topic",value,"hello")

It says:

Error Symbol=Left Frame - Communism, layer=Main Bar, frame=1:Line 1: Property name expected in GetProperty.
setProperty (“Main Topic”,value,“hello”)
Total ActionScript Errors: 1 Reported Errors: 1

What am I doing wrong?
Thanks.