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ARM: LPC2148/MCB2140 USB Mass Storage with DMA

Hello to all,
I'm trying to use the mass storage example for the MCB2140 in DMA Mode but I'm not able to get it to work. In Interrupt-driven Mode everything works.
But if I'm changing the flag for the DMA Mode for the endpoints 2 In or Out in the configuration wizard it doesn't work anymore.
After examining the source code I recognized that no dma init function is called, no DDPs are set and no DDs are defined. Does somebody can help me in archieving this ?
I tried already to change the sources but didn't have luck with it. Does somebody have maybe a changed example code ?

Any help would be appreciated

Wolfgang