Guns won't fire in custom mission

[Silent Film]

After the newest update for stable version, when I fly a custom mission from cold or hot start in Caucasus or in Syria, guns won't fire. But they still do fire in quick missions.

[grafspee]

Try switch gun safety.

[Silent Film]

Ah thank you, I am new to Spitfire, I saw that gun safety before, but since it was not clickable in the cockpit, I thought it was something not functional and of no importance.