DSPLIB FIR WITH INT32

Hi, 

I'm using C5515 eZdsp in order to filter an input from a ping pong buffer.

This is a snippet of my code:

FilterIn, Buffer, RcvL2 XmitL2 are all Int32.

FilterIn = &RcvL2[0];
buff_copy32(&FilterIn[0],&Buffer[0],FFT_LENGTH);
fir((DATA*)&Buffer[0],&filter_coeffs[0],(DATA*)&Buffer[0],&dbuffer[0],FFT_LENGTH,7);
buff_copy32(&Buffer[0],&XmitL2[0],FFT_LENGTH);

Casting Buffer to DATA (type from DSP lib) the output in filtered only for half a block

Is there a Fir function with LDATA inputs?

Any other solution?

Thanks a lot

Paolo