problem with disappearing emails

Greetings   

I downloaded the Bat  and have been using it for a
couple of days.  From the start, I have had problems with disappearing emails - when I
just click some part of my inbox, it empties - when I close and
reopen the Bat emails reappear in in box - but this morning they
disappeared altogether.

The 2 ISPs I use - Zen & Virgin = remove viruses from their systems
before they get to me - however, my virus checker on doing its daily
check this morning  informed me that it had removed 7 viruses from
my system     -  all in bat files ie bat3cc7.tmp   - viruses are
  i-worm/mytob.bt,   Trojan horse generic ajo, worm.netsky.b   -
  almost certainly came in with The Bat

  Anyone got any suggestions - is the disappearing email related to
  the viruses - I assume it is

  This I have reported to the Bat people

  Sean O'D