Good afternoon

 

I'm trying to use Ajax Uploader in a visual webpart which I have written for MOSS 2010.  On my local dev machine it seems to work fine, however when I ported it across to my testing environment, I keep getting the error:

 

 

This happens at random points during the file upload process.  Maybe once in every ten it will let a file through and my server-side events will fire and process the file as necessary, however the rest of the time it results in an error.

 

I thought at first it was because Silverlight wasn't installed on the test machine, however I'm still getting the error.

 

Any ideas what is causing this, and why it would work on my local development platform, but not when on another machine?

 

 

Thanks in advance

 

Matt