Basket/period converter problem.

I've changed the period_converter script into basket2 in order to create a new chart with a basket of two currencies. However, there is a problem in this script which I'm not able to solve. When you attach script to a chart (allow DDL calls and don't confirm calls) in its default settings, and then open offline BASKET,H2, it is working as it should. I.e. there is a chart with double period which is updated correctly. However, when I change ExtPeriodMultiliper to 1, then the offline chart BASKET,H1 is wrong and not updated anymore. Can somebody look at script and localize the problem? I'm clueless :-(