Normandy 44 problem

[Bioman]

These are the rules from the manual concerning ferrying:

Engineer units can also ferry some units across Rivers and Canals. The
requirements are:

• The unit being ferried must be moving into the hex containing the
Engineer unit or out of that hex.
• The unit being ferried must be of Foot movement class, or be of Ski,
Bicycle, or Horse movement class and consist of men (right click in Unit
Picture to see this information listed) or be a unit which is On Foot (see
section on Movement).
• The unit being ferried must have full Movement Allowance, must be in
Travel Mode, and must not be Disrupted or Broken.
• The Engineer unit must not be Disrupted or Broken, must have full
Movement Allowance, and must not be in Travel or Rail Mode (Note: the
Engineer unit must not be conducting Bridge Operations, but can be
maintaining a bridge).
• The hex being moved into must be valid for movement for the unit being
ferried.

If valid, then the unit being ferried uses its full Movement Allowance to perform
the movement. (The movement does not cost the Engineer unit movement
points.)

My units meet all of the above criteria and still can't move across the river. As I have stated above the Vire river is the only one that I can not move across.