Need help with Mod!

Trying to install DSotSC but having difficulty whenever i finish the install it says this

ERROR locating resource for 'APPEND'
Resource [BDDIALOG.2DA] not found in KEY file:
[./chitin.key]
Stopping installation because of error.
Stopping installation because of error.

ERROR Installing [Dark Side of the Sword Coast For Baldur's Gate: Enhanced Edition Version 1.01b], rolling back to previous state
Will uninstall 3027 files for [DS/SETUP-DS.TP2] component 0.
Uninstalled 3027 files for [DS/SETUP-DS.TP2] component 0.
ERROR: Failure("resource [BDDIALOG.2DA] not found for 'APPEND'")
PLEASE email the file SETUP-DS.DEBUG to http://www.baldursgatemods.com
Using Language [English]

Any help would be amazing !