migrate sharpdevelop project to visual studio

i have a project in sharpdevelop, this is vb.net, when i do a little modification the sharpdevelop is freeze , i use sharpdevelop 4.4, and i know the version 5 is not support vb.net, i want to migrate my project to visual studio, When i open the project woks fine, but i have any change in any form, i visual studio change the structure to the form,  the file ?????.designer.vb is modificated, into the lines with addhandler as follows:
"AddHandler Me.clientesbtn.Click, AddressOf Me.Clientesbtn_Click "
are deleted, all of them, and in "sub" lines, with events like next one: 
"Sub OpcionesToolStripMenuItemClick(ByVal sender As Object, ByVal e As EventArgs)"
visual studio  add the next into the end of line "Handles opcionesToolStripMenuItem.Click", then all lines sub with events have changes and when i compile the project i have multiple error, and they are de same
"Error18La cláusula Handles requiere una variable WithEvents definida en el tipo contenedor o en uno de sus tipos base."
I dont know how to repair the project, o exist any method to migrate from sharpdevelop to visual studio? please help me, thanks