Hello please everybody I need your help.

I successfully installed the RS Gallery 2 slideshow but then when I access the website, i got this error message.

Fatal error: Cannot redeclare getimgnamedisplay() (previously declared in /home/content/a/d/m/adminbarber/html/modules/mod_rsgallery2_slideshow.php:248) in /home/content/a/d/m/adminbarber/html/modules/mod_rsgallery2_slideshow.php on line 248



Help me please? Thank you