Usercontrol inside a formview

[mopa]

Hi
On my aspx-page I have an usercontrol in
an Insertitemtemplate on a formview.
In the oninserting event for the formview I would liike to add some
parameters whit values from the usercontrol.
I declare the user control and try to find it with formview.findcontrol
in the codebehind cs file:

I got the message the object does not exist in the current context.
Have I missed something special for doing a user control....

Tanks in advance