Problem with FileDescription information

So I'm using this function to retrieve FileDescription information from running processes :

Code:

                       proc GetFileDescription uses esi edi ebx,_fileName,_fileDescript
                 locals
                              subBlock1       TCHAR   '\VarFileInfo\Translation',0
                            subBlock2       TCHAR   '\StringFileInfo\%04x%04x\FileDescription',0
                           _handle rd      1
                           _size   rd      1
                           _ptr    rd      1
                           _len    rd      1
                           subBlock        rw      MAX_PATH
                    endl
                                                
                            invoke RtlZeroMemory,addr subBlock,MAX_PATH*2
                               ;       
                            invoke GetFileVersionInfoSizeW,[_fileName],[_handle]
                                or eax,eax
                          jz .out
                             mov [_size],eax
                             invoke GlobalAlloc,GMEM_FIXED or GMEM_ZEROINIT,eax
                          mov ebx,eax
                         invoke GetFileVersionInfoW,[_fileName],[_handle],[_size],ebx
                                ;       
                            invoke VerQueryValueW,ebx,addr subBlock1,addr _ptr,addr _len
                                or eax,eax
                          jz @f
                               ;
                           mov edx,[_ptr]
                              virtual at edx
                                      .language       dw      ?
                                   .codePage       dw      ?
                           end virtual
                         
                            movzx eax,[.language]
                               movzx ecx,[.codePage]
                               ;
                           cinvoke wsprintf,addr subBlock,addr subBlock2,eax,ecx
                               invoke VerQueryValueW,ebx,addr subBlock,addr _ptr,addr _len
                         ;
                           or eax,eax
                          jz @f
                               invoke lstrcpy,[_fileDescript],[_ptr]
               @@:         
                            invoke GlobalFree,ebx
               .out:       
                            xor eax,eax
                         ret
                 endp

/*Arguments to the function are memory addresses*/

and it is working for every process I started and tested ( and compared to the Process Explorer ) except one ( for now ) ,
that one is FASMW.EXE from fasm package,
according to process explorer file description for fasmw.exe is flat assembler ( right mouse click / properties confirms ) but the second call to the VerQueryValueW return false and empty string,
and I really dont know why ( no GetLastError for this func ),
so if someone could test this func and illuminate me I would be really appreciated...

thx