COSTS — security for costs — plaintiff ordered to pay security for costs in two tranches totalling $150,000 — plaintiff brings application to vary the order to provide for five tranches of $30,000 — plaintiff fails to pay first $30,000 — application for dismissal of proceedings — plaintiff granted an extension of time to pay the first $30,000 but fails to do so — plaintiff fails to pay second tranche — defendants point to unlikelihood of plaintiff complying with the security orders in the future and to issues of prejudice — PRACTICE AND PROCEDURE — application by plaintiff to reopen its case after judgment reserved — application refused — statement of claim and cross-claim dismissed