You're using MSXML4 already. Can you provide more details?

>We have an older app built using MSXML2 DOM to manage XML data feeds and it has stopped working. We are getting HTTP request errors 0 (Message OLE IDispatch exception code 0 from msxml4.dll: System error: -2146697208).
>
>Two questions:
>1) Can anyone tell me what this error means? I am having a hard time finding out where to get info on this error.
>2) If we convert the program to use MSXML4 are there any gotchas to be aware of?
>
>TIA for any help you can provide!
>Margaret