error in multisim live .model for a custom diode

[uend83]

I need to simulate a ideal diode in multisim live. so i put ".model diode d(Ron=0 Roff=1M Vfwd=0)" in the box of "user defined model (D)" but after transient simulation I have this error: Ron Roff and Vfwd are unknown parameters so will be ignored. why?! in LTspce works so good!

[tipa]

Because different SPICE syntaxes in programs

[uend83]

oh...I understand

what is the spice here in multisim live and what in ltspice? thanks again!