Changing SPI In Campaign etc,

[mraidanpreston]

So I have recently started playing some of the campaign missions etc in DCS A10, only problem compared to my custom fast missions is I can press Left Ctlr and Down and clear my spi,and set a new one for a different tank in the area it works fine, but in campaign it dosen't? I have tryed clearing it etc?

 

Please someone help me out here, still learning and would love to know this:-)

 

~Sorry for nooby questionl-)

 

~Aidan