IIs error 502.2 being returned upon connecting to cgi gateway application

YRMC_Infrastructure
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Hello,
           This is in regards to a pagering system setup which involves a front end app (ASP.net) that allows the users to log in, compile there message , enter a pager number,  and then does a sendpage to a CGI gateway app which in turn sends the page through a pagering application. This is a new setup and we have been able to get it to work and tested it for several days when suddenly it broke one day and seems to fail right at the point where a sendpage occurs between the asp app and the CGI gateway app. And the error returned in the browser is this:  

HTTP Error 502.2 - Bad Gateway
The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are ""

 

So even if we  go directly to the url of the CGI app in browser we still receive same result.

FYI, This appliction is hosted in IIS 7.5 on Windows 7 professional os.
How could it suddenly start giving this error, what could have possibly changed...I know that the code did not.

Any help would be greatly appreciated, and for any further questions, just ask...

Thanks and Regards,
-Mr. S
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Commented:
Are you sure the data you are sending to your sms provider gateway is set up correctly?  Is it a paid 3rd party source and you are paid up?

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