BASCOM-AVR : I need help Ltc2621 DAC does not work : NEWTOPIC

I'm working on a project with a "Ltc2621," the problem is that I am not getting the "Ltc" get the data directly, for example, if I put a counter he reacts by increasing the output, but if you change the value for 4095 the maximum for 12-bit it does not run. I thank if someone could help me Porelo BASCOM-AVR 2.0.7.6.001 [b:a694426aee][color=red:a694426aee](BASCOM-AVR version : 2.0.7.6 )[/b:a694426aee][/color:a694426aee]