included preamble not recognized

If I write my preamble in my latexmain file everything works fine.

But if I include my preamble-file with:
file name: preamble.sty
\documentclass[fontsize=11pt]{scrreprt}
\usepackage{preamble}
\begin{document}
\input{txt/hello}
\end{document}

Latex-Suite does not recognize the custom package, So EFI does not work the right way (\includegraphics instead of \psfig) because latex-suite does not recognize the in the preamble included package graphicx.

I tried to trace the issue and I think latex-suite just does not search through included files the right way.

The attached tiny patch solves the issue for me.