LVDS_TX no output

Hi,

I have a problem with the mega function LVDS_TX.
Nothing is coming out of it! I check with SignalTap the "in" signal and they are good.

It's for a DAC3282.

I have 32 bit input, 8 channels output , deserialisation factor 4.

The 32 bit came at 10Mhz, so the output data rate is 40Mbps.

But the LVDS TX out is always '0'. I tested with fix value to tx in, but tx out also at '0'.

Really need help!