Sar in AFL question

[sgregory2001@xxxx]

I am new to Ami and like it alot but have a problem when starting to 
use AFL. Why will this not work for SAR: "buy = cross(close, sar( 
accel = 0.02, max = 0.2 ) );"

I want the parameters in the script so I can change them later.
I get a syntax error after the = on the max parameter.

Any help appreciated and thanks to the author for a really useful 
program.

Regards,
Steve