Hi,

 

the 'Guid Error' means the file guid is conflict.

 

We has a bug on that of the version one day ago. and we have uploaded a new version last night.

 

I am not sure it can fix your issue.

 

So please download and test it again.

 

You can debug on this steps:

 

1. check the value of the file guid each time, if it has the same value ??

 

2. do you return true even that file is not exists?

 

3. check the HTTP header , whether there is CuteWebUI.AjaxUploader.Silverlight or

CuteWebUI.AjaxUploader.Partial header.

 

4. how about use the default uploader provider ?

 

Regards,
Terry