Ajax Tab Panel and File Upload

Iam using ajax Tab Container , there i have one File upload , when i use that File Upload without ajax tab container it works fine , but in Ajax Tab Container it gives me an error that "Object reference is not set to instance of object", kindly help

regards

is it inside an update panel ??

the update panel is listed as not working with certain controls.

File upload, and tree view being 2 of the biggies.

IN any case, one solution is available on code project:

http://www.codeproject.com/useritems/simpleajaxupload.asp

if you look around the forums and google, you can read more aboutthe problem if your interested, but the code project solution shouldget you started.

From the online documentation:

http://ajax.asp.net/docs/overview/UpdatePanelOverview.aspx

Controls that Are Not Compatible with UpdatePanel Controls

The following ASP.NET controls are not compatible with partial-page updates, and are therefore not supported inside anUpdatePanel control:

TreeView andMenu controls.