hi i have nuke 7.2 on my site,,i tryed to change my theme to another first i added new theme to data bace and took my old one out,i open my page up now this is the error i get

Warning: head(themes/themes/theme.php): failed to open stream: No such file or directory in C:\Program Files\Apache Group\Apache2\htdocs\bigboy\header.php on line 31

Warning: head(): Failed opening 'themes/themes/theme.php' for inclusion (include_path='.;c:\php\includes') in C:\Program Files\Apache Group\Apache2\htdocs\bigboy\header.php on line 31

Fatal error: Call to undefined function: themeheader() in C:\Program Files\Apache Group\Apache2\htdocs\bigboy\header.php on line 50

i have taken new theme out and installed the old one still get the same error....i was using subBlack 3d