Avast Mail Shield Not scanning all pop accounts

I have had a help ticket open and it isnt helping so now i wonder if anyone else is suffering from this problem or can tell me what my dumb butt is doing.

I have windows 7 and used office 2007
I have two e-mail accounts through yahoo
pop.mail.yahoo.com 995
smtp.mail.yahoo.com 465
Both accounts download into differnt datafiles (meaning differnt pst) within outlook under one profile. i hit send and recieve and it downloads account 1 then downloads account 2.
ok here is the weird part
Avast will scan mail comming in on account 1 but once account 2 starts downloading avast stops and says no mail is downloading.

both are set up to default and the ssl are set through advanced setting in avast.
both are set up the same except for user names and password
so I can not figure out why it is doing this and wanted to know if someone can tell me what I am doing wrong… and how I can fix it

many thanks,
mike

oh and fyi I have deleated all .pst’s even upgraded to windows 7 with a whole new hard drive so it isnt something computer related it is either I can have a different .pst for each mail box or a setting in avast