Problem starting a PBEM game of WinSP:MBT

[Chipmunk]

I've just encountered a weird problem trying to start a PBEM game of MBT. I started the game and did my purchases and then sent the file off to my opponent. When I try to load the file he sent back I'm not being given any option to deploy my units. Instead the only option available is to start turn 1, and if I choose this the game begins with my units all deployed lined up along the map edge. Anyone know why I might have lost my deployment phase and how I can get it back?