serial key wont work

[horseman007]

i have come back to playing m&b after some time and my serial key no longer seems to work

 

[Cleomenes]

What does it say?

 

[jdc2]

I am also having this same problem so please help, and it says "Incorrect serial key!"

 

[Zilberfrid]

I have the same issue, I tried starting regular plain old M&B, and found it no longer accessible, my key is a 5x5 key bought in 2008 I think, it now wants 4x4, but I can't convert it in the warband key converter thingamabob.

EDIT, I figured that buying it through steam was warranted, it still is only about 20 euro's for a game I spent so long playing

 

[Kleidophoros]

Please make sure you are using M&B keys with M&B and NOT M&B: Warband.