Chances are CT has set up a Firewall between the internet and the SQL servers and are only allowing certain IP's through said firewall. Contact them and see if this is the case. One thing to note is that unless you are paying for a static IP address through your ISP you are probably not going to be able to touch your production database from your dev system. Since you would have a dynamic IP address that would refresh and possibly change after a given period of time it makes it impossible for CT to whitelist your IP.
hth.
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Read this if you want to know how to get a correct reply for your question:
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.: Wrox Technical Editor / Author :.
Wrox Books 24 x 7
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