How to adjust static forecast to dynamic forecast based on VECM?

[Christian Danner]

I am forecasting some price based on VECM. My static forecast works fine, but by adjusting to a dynamic forecast, I get results that are not meaningful.
Here is my code:
// VECM on weekly data for time period 2010-2012 (lag selection based on AIC to avoid serial correlation, rank based on Johansen test)

vec lnprice lnx1 lnx2 lnx3 lnx4 lnx5 if d2010-2012==1, trend(constant) rank(3) lag(4)
eststo evecm

I now want to forecast lnprice for some time period (2000-2006) prior to the estimation period (2010-2012) to compare to actuals available:

//Create model
forecast create fvecm, replace

//Add estimation results VECM
forecast estimates evecm  // 6 endogenous variables added

// Identify the five exogenous variables
forecast exogenous lnx1 lnx2 lnx3 lnx4 lnx5

// Obtain static forecasts
forecast solve, prefix(fcs) begin((w(2000w5))) end((w(2006w52)))  static

A graph showing the static forecast of lnprice vs. actuals of lnprice shows meaningful results.

Now I want to generate a dynamic forecast by adjusting the last command

forecast solve, prefix(fcd) begin((w(2000w5))) end((w(2006w52)))

A graph showing the dynamic forecast reports some movement in the first periods and then changes to a linear slope.

The -fcast- command does not work as the forecast period is prior to the estimation period.

Any direction how to adjust for a dynamic forecast would be extremely helpful!

Thanks in advance.
Christian