[Carbon]

I was recently adding a new upgrade and I ran into a really odd error....it won't let me build it. All the links check out too...it evens displays the upgrade cost correctly, but won't let me purchase it. Anyone know what may be causing this? Here's my code....

CommandButton Command_UpgradeColumbiaCamouflage
Command = PLAYER_UPGRADE
Upgrade = Upgrade_Guerrilla
TextLabel = CONTROLBAR:UpgradeGuerrilla
ButtonImage = guerrilla
ButtonBorderType = UPGRADE ; Identifier for the User as to what kind of button this is
DescriptLabel = CONTROLBAR:ToolTipGuerrilla
End


Upgrade Upgrade_Guerrilla
DisplayName = UPGRADE:Guerrilla
BuildTime = 60.0
BuildCost = 2000
ButtonImage = guerrilla
ResearchSound = RebelVoiceUpgradeCamoflage
End

CommandSet ColumbiaMissileControlCommandSet
1 = Command_UpgradeColumbiaCamouflage
11 = Command_MissileBattery
12 = Command_Sell
End