MS Project 2003 losing addin menu item handler after closing addin window 1st time

[Daniel Callegari]

Hello,

We are developing an ADDIN for Microsoft Project 2003, using C#.Net
(Framework 1.1).

The instalation runs successfuly and the menu items we added are appearing
correctly.
When we click a menu item, we show a first Form. We have other 2 forms.

The problem: no matter the form the user closes, our addin refuses to run a
second time.
It seems MS Project "disables" the addin, while keeping the menu items.
Sympthom: when clicking the menu item again, there is no answer.

We are using "this.Close()" for the OK buttons, but this happens even if the
user clicks the "X" of the window.

Question: Are we missing something here? How come MS Project "lose the
handler" to our menu item?

Thanks in advance,
Daniel