No ammo in missiion transfer to spit

[NLS61]

I'm having trouble to get anny ammo in my hurri in the campain mission where it is decided that you want to be clodser to the action.
So you fly your Hurri to the new loaction were you'll get a spit.
Along the way you are jumped by a couple of 109's wich wouldent be a problem if I couls have any ammo
any other mission the ammo is automaticly loded but on this mission my guns do not fire,
Any suggestions?

Niels