AX Retail 2012 Plug-in Customization Problem

Hi All,

I have problem when try customize some of services library for AX retail, when i deploy dll into POS services folder and start the aplication it always showing error message "could not load all external service modules" and POS could not start.

This only happen for services dll, also for simple .dll like blank operation, but when i try customize Trigers it's work normaly. on AX Retail 2009 R2 this problem never happen .

I'am using AX 2012 and CU3.

Can anyone help me about this problem?

 Thanks.