HyperV Network Issue

I have two HP server.I have installed Windows server 2012 r2 standard on both.

from eath Hp server only NIC 1 is connected to the switch

This is the Scenario.

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Host A     (ip:192.168.0.20) HyperV installed

VM1:

OS: MICROSOFT WINDOWS SERVER 2012R2

IP: 192.168.0.21

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Host B      (ip:192.168.0.22) HyperV installed

VM1:

OS: MICROSOFT WINDOWS SERVER 2012R2

IP: 192.168.0.23

VM1:

OS: MICROSOFT WINDOWS SERVER 2012R2

IP: 192.168.0.24

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Now the issue is i can not see vm's on different server from a server. for example i can not see vm1 and vm2 on host B from Host A.I am also not able to ping vm1 on host A from host B. ihave access to internet on all vm's.i can also ping all vm's from router!