[SOLVED] Can't find unit Gtk2WSFactory used by Gtk2Int

[Fred vS]

Hello.
I try to recompile a prog developed in Lazarus 32 bits into Lazarus 64 bits.
I get that message:

Recompiling Gtk2WSFactory, checksum changed for Grids
gtk2wsfactory.pas(11,35) Fatal: Can't find unit Gtk2WSFactory used by Gtk2Int

Here the log given by terminal :

Target OS: Linux for x86-64
Compiling biotray.lpr
PPU Loading /usr/lib/lazarus/0.9.30/lcl/units/x86_64-linux/gtk2/gtk2wsfactory.ppu
PPU Source: gtk2wsfactory.pas not found
Recompiling Gtk2WSFactory, checksum changed for Grids
gtk2wsfactory.pas(11,35) Fatal: Can't find unit Gtk2WSFactory used by Gtk2Int
TCodeHelpManager.GetFPDocFilenameForSource Hint: file without owner: /usr/lib/lazarus/0.9.30/lcl/interfaces/gtk2/gtk2wsfactory.pas

Some modifications where done in Grids.pas but i never get that message with other applications who uses Grids.pas modified...   

What is the problem ?

[Fred vS]

Oooops i get it 

I have to recompile Lazarus with GTK2 (i was using a Lazarus version compiled with Qt) 

Done and sorry to disturb