[amibroker] TimeNum: What Am I Doing Wrong?

[longarm61]

Hi,

I just want my buy rule to apply from 9:30 to 10:30.  Apparently 
there's a syntax error with the code below (second line, at the end), 
but this dummy can't figure it out.  Would somone be kind enough to 
tell me what I'm doing wrong?  Thanks.


Buy =   Close > MA(  Close , 20 ) 
        AND TimeNum()>=93000 AND TimeNum()<=103000);