The HoverflyPRO is compatible with most standard hobby ESCs. However, some ESCs such as Maytech and CC (higher amp 35A, 45A, etc) do not work properly on all ports. It is recommended that you use a signal booster such as one of the following on ALL ports.
You can also make your own using parts easily obtainable at your local electronics store (Radio Shack) using the following schematic.
You typically only need to add signal boosters to two motors. Try adding the boosters to the ESC outputs as shown below first. If you still have trouble add signal boosters to all connections.