I have a function that has this code:

Btnbuscar.Visible = False
Pbuscando.Visible = True
. Sentences
. Sentences
. Sentences
. Sentences
Pbuscando.Visible = False
Btnbuscar.Visible = True

When I clic in the bottom (acording my debug, the sentences be execute), but the is still show and the panel don´t show.

What could be happend?
What I´m doing wrong?

Note: I´m used VS2003