License does not allow using of the product on this operating system

recently my office bought license for AVG Server Edition. when i put license code, it said "The License does not allow using of the product on this operating system". last year i put the code, it worked. what should i do?
sorry for bad english

Other user Tonni g postiing (https://support.avg.com/answers?id=9060N000000gBEKQA2).
Tonni, In future please refrain from carrying out multiple postings basically on the same subject! You won't obtain an answer to your query any faster!. Also please try to keep the whole conversation in one question/thread to speed up any resolution. 
General topic info… "Business products" support… For assistance have a look @ this AVG webpage (https://support.avg.com/business_contact_form?l=en_US). Please be informed that this Community forum basically deals with 'home' version of AVG products. Furthermore the "Business products" area has now been removed from the 'Community topics' list @ the top LHS of this page. Finally please be informed that the support for "Business products" is not now available within this Community.
AVG Guru

Other user Tonni g postiing (https://support.avg.com/answers?id=9060N000000gBEKQA2).
Tonni, In future please refrain from carrying out multiple postings basically on the same subject! You won't obtain an answer to your query any faster!. Also please try to keep the whole conversation in one question/thread to speed up any resolution. 
General topic info… "Business products" support… For assistance have a look @ this AVG webpage (https://support.avg.com/business_contact_form?l=en_US). Please be informed that this Community forum basically deals with 'home' version of AVG products. Furthermore the "Business products" area has now been removed from the 'Community topics' list @ the top LHS of this page. Finally please be informed that the support for "Business products" is not now available within this Community.
AVG Guru