[Gretl-users] 2SLS

I need another information. I'm struggling to make a two least squares estimation from my panel data. Can you please give me the text i need to write in the command window to tell gretl that i want to estimate a system of two equations with dependent, endogenous and instrument variables?? I have one main equation: RIT = VEGA + ASSET + TRAD + CIL + CONC + TIME DUMMIES in this equation RIT and VEGA are endogenous, so i want the second equation to be VEGA = RIT + ASSET + TRAD + CIL + CONC + TIME DUMMIES Please can anybody help me?? i'm going mad cause gretl always gives me error! thanks really thanks GM