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Communication between IRC5 Compact and CTM Module

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Hi all,

Is it possible to get communication between 4 IRC5 compact controllers and 1 CTM module trough a managed switch from Allen Bradley?
Because if we connect the CTM module directly to 1 of the IRC5 compact controllers the communication is established immediately. Once we try again trough the managed switch, which is configured as a normal switch at the moment, the communication is lost.

We use the following IP settings on the WAN ports of the IRC5 compact controllers:
- Controller1:
      IP:            10.10.3.45
      Subnet:    255.255.240.0
      Gateway:  10.10.0.254 

- Controller2: 
      IP:            10.10.3.65
      Subnet:    255.255.240.0
      Gateway:  10.10.0.254 

- Controller3: 
      IP:            10.10.3.85
      Subnet:    255.255.240.0
      Gateway:  10.10.0.254 

- Controller4: 
      IP:            10.10.3.105
      Subnet:    255.255.240.0
      Gateway:  10.10.0.254 

The following IP setting is used for the WAN port of the CTM
      IP:            10.10.4.85
      Subnet:    255.255.240.0
      Gateway:  10.10.0.254 

Any help would be welcome.