specific serief of dhcp user not access internet and defualt gatway

i have a dhcp pool in cisco router 2811
 ip dhcp pool ccp-pool1
import all
   network 192.168.48.0 255.255.252.0
   dns-server 208.67.222.222 208.67.220.220
   default-router 192.168.48.1
   lease infinite

 No there ip of 192.168.48.0 and 192.168.49.0 series can ping 192.168.48.1 and access internet but when get ip in the series of 192.168.50.0 they cannot ping default gateway 192.168.48.1 and also cannot access internet.  however in dhcp lease defult gateway show 192.168.48.1.

i attach my router configuration as attachment

please tell me where i am wrong

and provide the correct command or access-list
thanks
ManojtanwarAsked:
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John EastonDirectorCommented:
You haven't attached your router configuration.  But I would firstly check the subnet address on the router is also 255.255.252.0.
ManojtanwarAuthor Commented:
sorry i forgot but i found my fault my wild card address in extend list is wrong i have done
thanks

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ManojtanwarAuthor Commented:
I found my fault in configuration i give 0.0.1.255 wild card in extended list hundred i change it to 0.0.3.255 wild card
thanks
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