AVG firewall blocking my business printer, since 3 years

Hello Louis,
I understand this must be upsetting. I would request you to submit your query to our business edition product support on this web page https://support.avg.com/business_contact_form?l=en&retUrl=business . They will get back to you via email at the earliest.

Hi! I have AVG Business edition to protect my server. I about to renew, but i always had a problem with the firewall that is blocking the printer of my MRP system. So I never could use the firewall and it's always been turned off. I tried a few time to allow this printer but no success. Please help me find the solution until the end of next week, or I'll have to try another product. This firewall has to work.
When I turn it on and try to print, there an aplication called "system" that is blocked. I have absolutely no idea what I could do to allow "system" from been blocked. It's not an application name. I paid to have a PC company to have a look at this, but they could not find a solution. Here's a picture. sorry it's in french, but it's all the same. It's the first line at the top. Like you see it's not the first time it hapenned. Thank you! 
http://imgur.com/rqkt9VS
 

Hello Louis,
I understand this must be upsetting. I would request you to submit your query to our business edition product support on this web page https://support.avg.com/business_contact_form?l=en&retUrl=business . They will get back to you via email at the earliest.