Comodo spam runtime error

When checking my email account. I get the following error half way through bringing my mail in…

Buffer overrun detected
Program:…ram files\Comodo\comodo anti virus\cavemsrv.exe
A buffer overrun has been detected which has curupted the program’s internal state.
The program connot saftly continue execution and must now be terminated.

It checks my blueyonder (isp) accounts. When it come to my yahoo account it will not finish bringing my message in. I realy need this to work.
Any help please ASAP as i have work emails to bring down.
Many thanks