synchronization gmail

My eMClient is no longer synchronizing any GMail account. 
I have another non Gmail account and works.
Hotmail started to work after I reinstall as Exchange.

What can I do???

Do you use any third party anti-virus/firewall application? If you do, disable them and see if there is any difference.

Gary, I’m using AVAST Antivirus… from a long time ago.
I have just re installed the Antivirus, and it looks eMClient started … I don’t know for how much time.

Do you have recomendations about the virus configuration? 

Maybe I have clicked on some option improperly

trhank you