IP with Firewall

My datacenter just installed the firewall card for my windows 2003 server and they open all the ports needed for me.

However somehow i'm able to use only one IP from a block of 5 assigned to my server.

eg:
http://69.93.37.66 >> fine
http://69.93.37.67 >> don't recognize it

What else do i have to do? i emailed them and no answer so far.

I'm not familiar with the firewall, and the configuration is on their end. I can't find any software installed on the server to make an adjustment.

 

 

 

 

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