scanning bos in the bottom corner of the screen??

i know how this is supposed to work, scanning larger files over the 2048 k size, but nod is scanning evrything on every page . even if they are only like 16k or 22k, this is slowing my dial up connection very much. yes i know its dial up but we can not get dsl or cable here at my business?? why is this continually scanning everything i did make sure to double check the setting for it. even if i uncheck or leave it checked it still keeps scanning??

 

IMON normally scans regardless of size - it switches auotmatically to passive mode for files over 2048KB unless it was already using passive mode (as determined by 'compatability setup')