Problem for execute two buttons AddIns at the same time in ArcMap

[JavierCruz_Lugo]

Hi, I am working on a AddIn button for ArcMap to Export and Import a ShapeFile, my problem is: when I want execute the two buttons in the same time, ArcMap generate the next error ???ArcGIS Desktop encountered a serious application error and can not continue???  and the Windows of ArcMap closed immediately.

Thanks¡¡¡¡¡¡

[JavierCruz_Lugo]

this is my problem
[ATTACH=CONFIG]33685[/ATTACH]