Getting Sense Code 37303

Hi,

I'm getting the error (Sense Code 37303) while building my CS5 encore project to disc. I've use my internal DVD-rom (of my MacBookPro)  as well as a external Samsung (usb) burner. With both the same issue. I can create a DVD Folder or a DVD image from my project.... but trying to burn to disc from Folder or Image returns in also a "PrimoBurnerDSK - unknown error" also with both DVD-roms. This is highly unusual as both disk burn perfectly with Toast or with iDVD ....

Please need some help.

Regards Sudhier