First HTTPService request takes forever

Ok.  I have an interesting event taking place with my application.
The first HTTPService request takes about 10-20 seconds and then, any additional requests are made between 1-5 seconds.
A user types in a country code that and clicks a submit button.  The request is sent to a PHP page with the variable, the PHP creates an XML response.  Flex updates a datagrid accordingly which shows rates/minute for phone numbers with that country code.
Any suggestions as to why this might be?
Thanks in advance.
Other Thoughts:
First Request = 7 results (about 15 seconds)
Second Request = 168 results (1 second)
Third Request = 3028 results (5 seconds)
Fourth Request = same request as First request (less than 1 second).

im not sure about that one. i havent seen that issue before. as for the 'if i delete itunes, will it delete my music' question, the answer is no. if you uninstall itunes, it will just leave your music on your computer.

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