Unknown client

[Tevfik Ceydeliler]

Hi,
Altough I have this configuration in client .conf:

##################################
client 172.30.47.241 {
        secret          = 877909
        shortname       = VodafonePinarsuAPNYeni1
        nastype         = other
}

client 172.30.47.242 {
        secret          = 877909
        shortname       = VodafonePinarsuAPNYeni2
        nastype         = other
}

####################################

Why I get this error?

################################################################################################# 


Tue Mar 17 14:31:55 2015 : Error: Ignoring request to authentication 
address * port 1812 from unknown client 172.30.47.242 port 58312
Tue Mar 17 14:32:01 2015 : Error: Ignoring request to authentication 
address * port 1812 from unknown client 172.30.47.241 port 6040

################################################################################################# 


And I am sure that secret is correct.
Any idea?
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