I just edited your question, and changed SQL to MySQL - and it worked fine. It may have been a one off? Finger trouble? Seems to work fine to me... Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

I would advise you to examine very carefuly your use of the streams and the WebResponse -- also avoid trying to reuse them -- this is an inherently asynchronous process and trying to create an SMS bulk texting application is not what those classes are intended to do -- it is one thing to use them to mimic browser fetches, but quite another to use them statically for multiple texts. At the very least, close them and get them each time -- the Response -- are you reading to the end and closing the response?