It is very strange problem! we can't simulate it in our machines.
We have found some similar problem solutions by google, here is one of those:
To fix this problem, you can make 2 different registry changes on the your server.
1.Increase the dynamic port range. As stated above, the default is 5000 but this can be raised up to 65534.
Using Regedit, navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\MaxUserPort (if this key does not exist, create it as DWORD value)
Set the value to 65534, or a value of your choice
2.Reduce the amount of time that the connection is in a TIME_WAIT state.
Using Regedit, navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\TCPTimedWaitDelay (if this key does not exist, create it as DWORD value)
Set the value to 30