same campaign problem as overland48

My problem is I can't seem to start a new campaign. When I click on the campaign tab then start new campaign input all new info and click ok all I get is this message. "No British HQs/squadrons can be properly placed with spacing 2 given the current sqadron data and front line shape." Is anyone familiar with this problem and can you help me resolve .Please tell me step by step what to do. Thank you for your time