can not use action in exchange scan logs

the exchange real time shield has found some infected files and when i go to the scan logs i can see them all, and i have a drop down menu in the action column for each infected file. they are all set to move to chest wich is what i would like to do. but there is no button down below to perform these actions. there is also no info in the result column so i asume avast has not tryed to do anything with these infected files.

i’m running sbs 2011 with exchange 2010, not sure what other info is relevant