I am making a poster using beamerposter and trying to create my own theme. But I'm having trouble with the sidebar. I want the sidebar to be on the left hand side along the entire height of the poster. However, when I put the title in the header, the sidebar disappears from the header. It looks like this:

example code:
\documentclass{beamer}
\usepackage[orientation=landscape,width=46in, height=42in,scale=1.4,debug]{beamerposter}
\usepackage{graphicx}
\usepackage{color}
\usepackage{xcolor}
\definecolor{Light}{gray}{.80}
\definecolor{dgreen}{rgb}{0.,0.6,0.}
\makeatletter
% sidebar
\setbeamersize{sidebar width left=0.075\paperwidth}
\setbeamertemplate{sidebar canvas left}[vertical shading][top=green!23!blue!49, bottom=green!15!blue!42]
% headline
\setbeamertemplate{headline}{
\leavevmode
\hbox{
\begin{beamercolorbox}[wd=.075\paperwidth,ht=0ex,dp=0ex,center]{}
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.92\paperwidth,ht=4ex,dp=0ex,center]{}
\end{beamercolorbox}%
}
\hbox{
\begin{beamercolorbox}[wd=.08\paperwidth,ht=0ex,dp=1ex,center]{}
\end{beamercolorbox}
\begin{beamercolorbox}[wd=0.92\paperwidth]{headline}
\centering
\usebeamercolor{title in headline}{\color{fg}\textbf{\veryHuge{\inserttitle}}\\[1ex]}
\usebeamercolor{author in headline}{\color{fg}\Large{\insertauthor}\\[1ex]}
\usebeamercolor{institute in headline}{\color{fg}\large{\insertinstitute}\\[1ex]}
\end{beamercolorbox}
}
}
\def\beamer@andinst{\\[0.15em]}
\makeatother
\title{Title of the poster}
\author{\textcolor{dgreen}{author 1}\inst{1} \and author 2\inst{1} \and author 3\inst{2} }
\institute{\inst{1} Institution 1 \and %
\inst{2} Institution 2 }
\date{}
\begin{document}
\begin{frame}{}
contents
\end{frame}
\end{document}
I also tried putting everything in a separate .sty file. When I did that for some reason the sidebar only spanned part of the poster. But when I define the sidebar inside the main .tex file, it does span the entire height of the page before I put the title in the header. When I put the title/author in the header the outcome looks like the image above. But I would like the sidebar to span the whole page. I would appreciate help with this.
Thanks.

\ifdim\beamer@sidebarwidth>0pt ... \fi– sharif Jul 16 '15 at 16:04