Copying files from a network path

[melance]

I am trying to copy files from a network path during installation, however; the files are not copied.

code:
!define FileCopy `!insertmacro FileCopy`

      !macro FileCopy FilePath TargetDir

          CreateDirectory '${TargetDir}'

          CopyFiles '${FilePath}' '${TargetDir}'

      !macroend

code:
Section "!Application" SecApplication

      SectionIn RO



      ${FileCopy} '\\networkpath\path\file.txt' '$INSTDIR'



SectionEnd

Is there something I'm missing?