Jessen

This appeal is taken from an order denying the motion of appellant Hartford Casualty Insurance Company (Hartford) to disqualify the law firm of Wilkins, Drolshagen & Czeshinski LLP (the Firm) from representing respondent Claude Jessen, doing business as Ethylene Filters.Com (Jessen), in this action against appellant. Respondent’s counsel of record, James H. Wilkins, a partner in the Firm, was once an attorney with McCormick, Barstow, Sheppard, Wayte & Cairuth (McCormick), where he had represented appellant in numerous matters.

The trial court found that prior orders denying motions by appellant to disqualify Wilkins and the Firm from representing the plaintiffs in two earlier *703 federal court actions against appellant operated to collaterally estop appellant from disqualifying Wilkins and the Firm in this action. Because we find in the unpublished portion of this opinion that this ruling was erroneous, we will reverse and remand, with directions to the trial court to rehear the motion on its merits and to apply the correct legal standard—the “substantial relationship” test—which we address in the published portion of this opinion. (Flatt v. Superior Court (1994) 9…