C6A8168 EDMA problem - Part two

Hello everyone,
I can finally post again, using the Opera browser ... very strange!
However, thanks to Colombo, Randy and RV for the help given since now.
Let me explain better what is my target and what is the problem that is blocking me.
My goal is to create an audio application, where the DSP must perform signal processing, and ARM will manage audio parameters, monitoring system etc.. Then I have created an application with SysLink (and therefore IPC, SYSBIOS etc.) so that ARM and DSP can exchange events and structures. I've reached that goal, creating an application from a sample SysLink and bringing it back to CCS through the app notes:

http://processors.wiki.ti.com/index.php/Creating_CCS_Project_for_SysLink_samples.

Happy for the first result, I created a stand-alone sample DSP application in order to test the EDMA, which will be essential to manage the numerous audio buffers. So I did dma_int_copy function() (posted in previous thread http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/186595.aspx ) and it works fine. The problem (for several days now!) started from when I imported the function dma_int_copy () in the previous SYSLINK project. The DMA does not move the data, even though the events triggered regularly! it is as if the DMA does not see the buffer.
I suspect something on the MMU or DEMMU, but I do not know. Various evidence leads me to suspect even the platform ti.syslink.samples.rtos.platforms.ti816x.dsp.
If necessary I will post the project (tomorrow, because right now I'm home ... in Italy is night :-)).
Thanks for your attention, we hope to get things moving quickly, because here in the company the situation is a bit shaken ...

Bye bye

Paolo